Unfortunately, not all computers are the same.
I would never recommend something to BB members that I wasn't using myself.
I often recommended Mozilla Firefox on the BB. I've been using FF since the early beta version without any problems. Some BB members on the hand seemed to have problems with it. I know that to date more than 122 million people downloaded Firefox and use it without any problems. Exceptions do occur.
Same with Folding@Home. More than 2 million computers participated in the project since 2000 and most tech companies (HP, Dell, Intel, Apple, IBM, Google, etc.) support the project. F@H has been running on my computer for more than 300 hours straight and I have yet to notice any impact at all.