other Montrealer here - I also wondered why that is. Especially considering the amount of gaming companies around here, you'd think a lot of C++ would be in order. I have met quite a few rubyists, but python seems rarely used. PHP coders were always available, wherever I lived though :)
I've found in my job searching over the last few years that if you have a resume with good ruby chops, Montreal is the place to go. Seems to have the largest share of jobs in that area, at least from what I've seen.