My wife is not particularly tech savvy. She is a Linux user, however. When we started a new business, we needed certain applications that only run on Windows and since she would be at the brick and mortar location full time, I figured we could multi-purpose a new laptop for her and have her switch to Windows.
She hated it and begged for us to get a dedicated Windows laptop for that stuff so she could go back to Linux.
Some of you might suggest that she has me for tech support, which is true, but I can't actually remember the last time she asked me to troubleshoot something for her with her laptop. The occasions that do come to mind are usually hardware failure related.
Obviously the thing about generlizations is that they're never going to fit all individuals uniformly. My wife might be an edge case. But she feels at home using Linux, as it's what she's used to ... and strongly loathed using Windows when it was offered to her.
I feel that kind of way about Mac vs PC as well. I am a lifelong PC user, and also a "power user." I have extremely particular preferences when it comes to my UI and keyboard mappings and fonts and windowing features. When I was forced to use a Mac for work, I honestly considered looking for a different position because it was just that painful for me. Nothing wrong with Mac OS X, a lot of people love it. But I was 10% as productive on it when compared to what I'm used to... and I'm "old dog" enough that it was just too much change to be able to bear and work with.