Not too bad at all
I recently flew back to the US and took a couple of domestic flights before departing back to China and yes, I think the TSA is getting better. It is much better than in China now where everytime I get the wanding/full pat down regardless of whether or not I have any metal objects (I think the metal detectors are set to beep for everyone). No liquids of anykind are allowed on Chinese domestic flights so not even a baggie is possible.
In comparison at all my TSA checkpoints last month I didn't have to wait (SFO and ORD) and my bags/person made it thru without a hitch...if only the shoes didn't have to come off I'd say it would be perfect! Employees were generally friendly and helpful.