It's interesting to see that one thread is having a side discussion about tipping. I think it would be better as its own thread.
Curiously, many of you seem to agree with Rob Singer about no tipping.
Several years ago I wrote an article about tipping and my thought was there is no rule about tipping and it's a personal decision.
But if you're not getting the equivalent of a W2G win why would you even think about tipping?
My article:
http://www.alanbestbuys.com/id432.html