I think that the stereotype is true. While the entire business side of America, including manufacturing, office complexes, billing agencies, Wall Street, etc., runs on PCs...
This is somewhat overstated, but it is true that Windows dominates the corporate world, largely because of the server side part of the business, coupled with the corporate licensing structure. It also helps Microsoft that a major reason why big business sticks to Windows is that there is an entire culture of computer support personnel who depend on their Windows certifications and all of the flaky issues with Microsoft software to keep them employable.
In my own firm, I find it interesting to see the computer "experts" using Macs, iPhones and iPads for personal use, while complaining about the bugs in our firm's systems and software, yet refusing to "support" employees who chose Apple products to work with our vast network. As a result, I am one of the unofficial Apple techs for our firm. Computer Services often sends people to me to find out how to interface with our network since they cannot officially tell anyone how to do it.
And for my part, there's nothing to it. I can connect anyone's iPhone, iPad to the network faster and easier than native Windows devices. I was just asked this morning about connecting a Mac to the Exchange Server. I asked if the user had Outlook. Yes? Then it's a cinch. Even easier to connect than the Windows version of Outlook.
The idea that Macs can't/won't work in a Windows world is a myth.
...the artsy-fartsy crowd lives and dies with their Mac...
While it is true that I first started using a Mac professionally when I got into professional publishing (because Macs were, and probably still are, the only systems with reliable color matching) back in the 1990s, I had used Apple computers back in the early and mid-1980s.
However, I specifically chose a Mac for personal use simply because it was a better and more productive experience, more reliable, and relatively immune from viruses.
...and distinct lack of available software.
This is largely a myth. Furthermore, the Mac has lots of software that is unavailable for Windows that works better than most Windows alternatives. You can always natively runs Windows on a Mac to use the odd bit of specific software that is not available for OS X, but you can't do the same with a Windows PC. Almost all of my family (formerly die-hard Windows users) have converted to Macs over the past decade because they see how much easier my life is with my Mac.
2009 numbers indicate these percentage of users:
92.7% Windows
5.12% Mac
0.95% Linux
I doubt that's actually the percentage of users. Possibly the out-of-date percentage of sales for some region. Since Mac owners keep their computers longer than Windows folks, sales figures are only part of the story. Furthermore, you're assuming that more people using an OS somehow makes it better. That logic would indicate that a Chevy Impala must necessarily be a better quality car than a Lexus.
There are marketing stories out there that indicate that Mac has now captured over 10% of the market, but that seems to be hype based on new sales of Mac computers that people buy instead of fixing their current model like many PC users do.
Actually I think those are simply sales figures. Also, since Mac users keep their computers longer and a very high number of the people buying Macs are switching from Windows, I think you are engaging in wishful thinking. A better estimate of an installed user base would be browser stats from internet sites. I haven't bothered to look lately, but as I recall, more than 10% are using an OS X-based browser.
Cost is a major factor. Why pay almost double for the same level of performance just to run an emulator so common software can be used when you get all that and more for less $$$?
The cost thing is overstated too.
For high-end notebook computers, Macs are often the same price or cheaper. Furthermore, the quality of build is higher with notebooks milled from a solid piece of aluminum so they don't flex like many Windows-based notebooks.
Some of the desktop computers don't compare as well, but you're not just buying hardware, you're buying the OS and the total experience. Given that you really have no need of anti-virus software (I haven't run anti-virus software since 1999 and have had no viruses), and the system comes with quite a bit of powerful, usable software (not just demos) like iLife, there's added value that many Windows folks might not expect. Something else you might not expect is that since Apple has had a huge push to make more energy-efficient systems, the cost of the electricity to run your computer will likely make a noticeable difference in your electric bill. That's one of the reasons the iMac is a bit more expensive than a Windows tower with similar specs. Apple uses notebook computer components because they are more energy-efficient. You pay more up front, but save month-to-month.
Hardware wise, Macs now run the same processors that PCs run, and they have for years.
Yes. That means that there is nothing that a computer designed for Windows can offer than a Mac cannot. The same can't be said the other way around.
You
can get into a Windows computer for a lower initial cost, but the cost of ownership is much higher than simply the initial purchase.
If you like Windows, great! The good news is that Windows 7 Professional is actually a decent OS. Microsoft learned a lot from the Mac OS and added their own twist to it (sometimes for the better, sometimes for the worse).
If you like Macs, that's also great! Welcome! Those who have switched over the past few years are some of the most enthusiastic Mac people there are... including folks who spend their professional lives in "business" like accounts, engineers, banks, etc. It's not just for "artsy" people.