As a Python developer in SF, I can 100% agree with this. Ruby/Rails has replaced PHP for almost the entirety of new projects going forward out here — at least with the developers I know and respect — and Python makes up the rest.
So by looking at a tiny subset of programmers (those that you respect), of a tiny subset of programmers (those that you know), of a tiny subset of programmers (those in SF), you feel you can say something representative about programmers and programming as a whole.
