I wouldn't say your chances of being ahead are extremely high either. For arguments sake (please no one hold me to these figures) let's say you're ahead 50% and behind 50%. In that case, this is a clear bet, no? Just for the simple fact that you have a ton of outs when behind and he doesn't. Don't be too concerned with him folding for lone turn bet either. You will get called if he has TT or 99. These games aren't as solid as the ones you're used to.

Much of the discussion in question has to do with the generalization of unknown 10/20 players. Average (NOT solid) 10/20 players play pretty much like they would in casino "3 card poker". They bet 'pair plus' and continue with any pair HU because one day someone told them a pair is big heads up. Also, where you might expect an expert check raise on the turn in 100/200, you won't see it that often in 10/20 after significant flop action. Check raises run rampid in 10/20 for small HU pots, but not here.

Of course, this is all assumptive based on categorizing an unknown 10/20 player. Everyone's views on that may be different from their own experiences.

Just my opinon.