[admiralfluff]

I've played over 100k hands full (2/4 and 3/6), over 150k hands 3/6 SH, around 40k hands 5/10 SH a handfull at 10/20 SH. My winrate at 3/6 SH was around .6 BB/100 hands higher than at 2/4 and 3/6 full, but these sample sizes are still way too small for that too mean anything. From my experience, I feel that the 5/10 SH players are significantly worse than the 3/6 full players and that my winrate should be significantly higher. Unfortunately games change faster than winrates converge, so I we will never know for sure.

As far as 3 betting AJo after an MP2 open in a full game: the only difference between this situation and a UTG open on a 6max table is the aggression of the opponents. In SH this is a 3-bet because an average opponent may have a PFR of around 15%. In full ring, an average PFR might be 8%. It really depends on the player who is opening. Likewise if a sane 42/7 opened from UTG in a 6max game, you would want to fold your AJo.