I thought about it while running just now, and I glanced over Ben's post and the others. But here are my thoughts from my jog (other than THESE HILLS REALLY F**KIN SUCK!!).

Consider Hero 3betting JJ/TT against someone whose PFR ~ 15.

Case 1: Villain folds worst 10%, 4bets top 2% and flats the rest.

Case 2: Villain folds only worst 5%, 4bets top 2% and flats the rest.

Hero can value 3bet in case 2 (though it's still uncertain that whether he is better off flatting), because he's ahead of villain's call-3bet range. In case 1, he's just folding out all the hands he'd like to play JJ/TT against, i.e. helping villain play correctly against his range. I think there are a lot of Case 2 players at 10nl, who allow you to build a big pot with JJ/TT while they have 55 - JJ, KQ, and AT - AQ. I will be thinking about the correct ranges and when to 3bet and when to flat at 50nl later today.

Two more things I realized while running.

1. This is a great example of how badly you can suck and still pwn 10nl at 8 ptBB/100. You can have these mile-wide misapprehensions and actually win big with them.
2. I really did follow Ben's advice to not worry at all about small edges while there were gaping holes in my game. LoL, Dr. Ben, someone followed your prescription to the letter.