Okay, so based on what I've been reading, I'm amenable to revising my view on the matter a little. Frankly, I've never had to articulate these thoughts before, which were just an amalgam of observations over time sitting in the recesses of my brain.
It would seem that it is quite likely socio-economics would be a measurable factor in the development of the hockey-child into a hockey-adult. However, I still maintain that it is not strictly socio-economics at work, but that family/commitment-based qualities are represented (way) above average in hockey-culture. While I have seen no studies to substantiate this claim, the anecdotal evidence is too strong and numerous to ignore.
Now, let's talk about UFOs...