Well here is the answer, at least in my experience.

Nothing

At both ORD and LGA this weekend, absolutely nothing was different. I was able to go through without removing my shoes and without getting felt-up. I still had to hold my BP when going through the WTMD at LGA, but they have been doing that since the summer. With any luck, my flights later this week will also be as easy and painless.

Part of this "success" could be attributed to that fact that I have started "sizing up" screeners these days. Before joining a line, I look at the screeners at the WTMD to see if anyone is overly aggressive. When I see a hardcore screener, I avoid that line, and I look for a line with a screener who seems to be more in tune with reality. Obviously, this only works at some airports.