FWIW, I flew out of AUS a week and a half ago, 3/8, at around 1. I did get to skip the main line thanks to my first class pass, but I noticed the lines were significantly longer than usual (I assumed due to the scanners, as well.)

After opting-out (per my norm), they actually opened up the little side plastic gate separating the metal detector line from the backscatter line, moved me through, scanned my stuff, and automatically picked it up and brought it over to me at the chairs. I didn't even have to ask, so that was nice.

However, I couldn't help but laugh when I realized that after my patdown was completed (by a kid who couldn't have been more than 18) that they never wanded/scanned me at all. By bypassing the metal detector to get me to the patdown area, I figure they sacrificed the only real defense (besides the passengers) airlines have these days. Still can't believe that the only security check I got was a patdown from an awkward 18 year old (for reference...I'm a 23 year old male.)