The Battlefield 2 Website (thanks Frans) has word that the influx of Battlefield 2 players has resulted in delays in updating the results of games played on ranked servers:

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. Rest assured, however, that we will keep pace with the demand for Ranked servers, as necessary, though we may slow down deployment slightly this evening as we clear out the backlog of stats snapshots.

We want to emphasize that no snapshots have been lost and once we have this issue addressed, all players' progress will be accurately reflected in BFHQ. We thank the Community for their patience as we solve this issue.