http://www.chess.com/tactics/players.html
High scorers
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Thanks. Interesting. It looks like the list is pretty meaningless since there are GMs with ratings less than category B players. But it's fun to solve the puzzles. Addictive even. 
There's a bug that makes cheating possible. You can hit "show answer" and just as it's about to finish, you back out and come back in. It'll have the same tactic up, so you just play the moves you just saw. It works on Android phones, but not here.
Are the highest scores for tactics trainer published? I searched but can't find them.