Sounds like what I am seeing in my personal life... 6 years ago I didn't know anyone with a Mac... Now I can think of 14 people off the top of my head who all own a Mac (who didn't before)... And all but 3 of them bought MacBooks...
I'm not surprised at the DiscreetFX Platform Shift, either, based on people I know who do video projects for money 'on the side'. In the 1990's they were the Toaster then Flyer users and boosters, with those specialized Amiga hardware boards. In the 2000's they went to big WindBlows systems, with specialized hardware boards. Now, the only specialized hardware is the compression chips in their cameras, and they use stock hi-spec MacBooks with specialized software to do all their video work. At least, that's how I got my A4000T T/F setup