Is this even possible in the current build? I would love to know things like highest ranking attained, overall w/l record, highest/lowest ranking held, etc. And I don't even care about seeing other folks' statistics, just mine. I just want to see how average/mediocre I am.
Clicking on 'Leaderboards' from the MP lobby and then the '<<' button will show you the highest ranking players. You can view the number of daily/weekly wins there as well, though not losses AFAIK. The results board will show you everything so the data's clearly being kept, but the only filtering option is for yourself, and it includes non-ranked games as well ... so I have almost a whole screen of losses from restarting my custom scenario as I tweak it, heh.
There used to be info about your win/lose ratio games played daily and weekly during beta. But since the game is released, they have to patch it out to release stress on their database. Expect them to be back sooner or later.
It would be nice if each player had a profile page that showed statistics and stuff (basically like Starcraft 2). I don't think it's actually possible to view your current multilayer ranking without joining a game.