Word on the Battlefield 2 site is that ranked servers are taking nearly half a day to update stat's, not a major issue as such and just down to the sheer number of people playing.

we have run into some issues in processing the data from the nearly 400 Ranked servers we have deployed. As many in the Community have noticed, stats updates are taking about half a day to be reflected within BFHQ at this time. EA, DICE and GameSpy are all aware of this issue, and we are working promptly to make headway against the back log while also ensuring that this issue does not recur once the game has reached shelves all across Europe tomorrow.