That's correct, it's YYMMDD HH:MM:SS
Which is like a lot of other mysql formats -- at least in terms of date-order. Big to little.
Here's a sample from a dev machine's log from a little over a week ago:
130520 7:31:51 [Note] Event Scheduler: Loaded 0 events
It's From May 20th, 2013, at 7:31am.