Unfortunately he does have significant power within the wikimedia foundation (parent of wikipedia). He’s got a permanent seat on the board.

Thankfully wikipedia editors tend to act quite independently of wikimedia. But this sort of weighing opinion acting like they have sway on a controversial topic by Jimmy Wales (especially in the midst of wikipedia getting threats from the federal government), worries me a little that wikipedia may have its editorial independence under threat. (A talk page comment is still relatively minor, thankfully.)