Re-reading Barry's book I noticed that KTs is not a recommended starting hand except for special conditions.  I can agree 100% at tougher games but what about low limit games. WLLH by Lee Jones has KTs as a starting hand.

I read that online games are tougher than live and a 1/2 game might play more like a 10/20 game live or 8/16 live?

I guess that in a live 3/6 game KTs might be okay but for online games Barry's advice is spot on.

Maybe even toss it in live 3/6 games?

I have 81,000 (250) hands at Pokerstars and KTs is a winning hand but at Fulltilt I have 58,000 (182) hands is not a winning hand.

Maybe the 1/2 players are fulltilt are tougher - as Barry wrote you make a non-nut flush or a king with a bad kicker.