>The rate limit is extremely low for good minesweeper players.

This, I'm not good at minesweeper, but I've watch people who are and they generally clear a board before I even realize what's going on. I suppose it's a bit like NERTS, the multiple player solitaire, if you aren't that great at immediately recognizing solitaire moves, someone else beats you too them. I can play it with people I know but when I play with randoms that play all the time, I quickly lose.