I agree for the most part: We've traveled several times in the past three years but this past month noticed that BWI did NOT require anything to be separated or removed from your carryons, not even my laptop. TSA even told me that I could have kept it in my backpack!
Orlando was another story. I didn't remove my laptop (based on my BWI experience) but was told to at the last moment.
And what happened to pulling out your quart baggie of liquids? I even reviewed the online video info etc. and it still clearly shows the baggie in the plastic bin for screening. No one was doing that but us it seemed.
Oh, well! I'm sure there will be some new wrinkle when I fly in July!
Maybe you just happened to go through at a time when nobody but you had any liquids in their carry-on.

I mean, it could happen...
Personally, I think about half of the differences that people see in what's required of travellers are because TSA is not properly training its people in a consistent manner around the country; the policies are somewhat vague and subject to personal interpretation, and in the absense of proper training, each TSA screener does the best they can, influenced almost as much by their mood, personality, and philosphy as they are by the actual rules.
The other half of the difference comes from the fact that DHS likes to mix rules and policies up at random in an attempt to be unpredictable enough that "The Bad Guys" won't be able to follow them and figure out ways to circumvent them. Once in a while they also throw in a knee-jerk, paniced, reactionary measure in response to an actual threat, perceived threat, or potential threat, but most of those measures serve mainly to delay flights without significantly increasing security.
I think the hardest part about flying these days is keeping ones cool when confronted with the unexpected, either an unexpected delay or an unexpected security measure. When pulled aside for the Super Mega Ultra Platinum First Class Screening and Wanding, it's difficult not to have visions of being hauled off to Gitmo, indefinitely held incommunicado, and being subjected to perfectly humane, reasonable, non-torture interrogation techniches such as sleep deprivation, fake electroshock therapy, and waterboarding.
But if you can live through all that, Mickey is waiting for you at the other end.