Adding those up I get 56% humans, 43% aliens. I didn't bother with the other server though, and for some reason EU favors aliens more than humans, so you shouldn't just be looking at one of them.
I don't use tremstats for analysis. I'm not going to post the current graphs I do use yet (because it's a pain converting them and uploading, and I'm probably going to make a post with them this week anyway), but currently they show:
US: 407 Aliens, 475 Humans
EU: 405 Aliens, 324 Humans
Combined: 812 Aliens, 799 Humans
I don't know when tremstats was last reset, and the graphs don't count all maps and games (timelimits, not enough players for an actual game, things like that). At this point I'm not as concerned about the ratio, and only a little more concerned about how straight the lines are (how well the balance scales with game size) -- mostly the statistics are there to confirm I didn't horribly break anything while adjusting things based on my own judgement and your feedback.