[sweeng8]

Interesting post...
I usually play at 1/2, but have played 2/4 for a while. I am limited by my bankroll as much as anything as by the time I have enough to play 2/4 properly I need to cash out to pay for real life stuff.
I found the very opposite of your initial perceptions. There were nits everywhere. When I moved up I played tighter than usual just to get a feel for the games (I usually multitable full ring) but soon loosened up as the players there were just so tight compared to any limits I had played before. I agree that there is a far bigger difference between 1/2 and 2/4 compared to say 0.5/1 and 1/2, but in my limited experience the games get tighter (on ipoker and ongame networks)