Vs a fellow 2+2 member who didn't know I knew that. I normally do no 4 bet bluff at these stakes. But I had a very good understanding of villains game, so I figured they are 3 betting wide and folding a ton of it.
AP's play money headsup tables are pretty awesome, there is nowhere to get this kind of practice for free. Very good for learning how to crush noobs and maniacs at headsup, I had a lot of trouble with them at the 1c/2c headsup tables.
I wouldn't be surprised if there was 100NL+ players learning headsup at these games.