How long does it take? It depends on the method of reporting the illegal move. It takes Fencer much less time (and effort) if reported to him directly via PM than if reported in the BugTracker (or at least this is what my experience tells me).
What happens if unidentified pieces become identified as a result of the illegal move? I have no idea. Good question though. :)
(hide) If you click on a person's name and then click Finished games you will have a list of games that have been completed, then click on the name of the game to get a summary of all of these games, then click on the name of the game again and you will have a game to view and analyze. (Servant) (show all tips)