I returned from Orlando last night, having flown out on the evening of 9/13 from Los Angeles.
Honestly, I've only noticed two real differences at the airport from months and years past - first, that there is a much higher profile of uniformed personnel of various sorts, and second, that the security checkpoint is somewhat more thorough. My bag was not opened and searched other than the usual x-ray check, but I was subject to a physical search that lasted about a minute, including looking in my hat and my shoes.
Don't try taking things as simple as a nail file and a nail clipper in your carry-on. They're taking no chances in these things. (Even first-class is now eating with plastic utensils.)
Security was also very sensitive at the x-ray checkpoint - DON'T try taking pictures or shooting videotape, unless you're lonely and want some company very quickly.
At the main check-in counter, there was no difference. The same two usual questions were the only ones asked, and the folks at Delta were doing a *great* job of getting people through that line.
Because ridership is way down (28 passengers on a 757 last night), I found that showing up 2 1/2 hours early was entirely unnecessary in my case. At the
Virgin Atlantic counter, however, the line was gigantic.
Honestly, folks - it's not as bad as you're being told.