A quick recount of my lasting impressions:
Wilson:
The big Demo room at the Hyatt was amazing. I will list this as one of the truly incredible and memorable systems I have ever heard (along with the big Wisdom system at Newport Beach 2 years ago and the big Infinity IRS at a show many years ago).
All the other Wilson rooms were unimpressive though. Bad rooms (maybe) and a non welcoming attitude (definitely)
Vapor:
Can I give an award for most improved from Newport Beach? The bigger room helped the sound immensely and if you're in the market for a speaker in this price range, these should be on your short list. The Nimbus was just soooooooo much better here! I would love to hear the Joule Black and White side by side to see the differences. A few people made some comments about the Whites sounding a bit "hard" in the midrange. I didn't think so, but comparing the two would be nice.
I thought the Magico/Hegel combination was very nice. Definitly worked better together than the Hegel/Thiel combo I heard previously (and I own Thiels)
KingSound:
When I heard the big Electrostats, I was impressed. When I went back later and saw (then listened to) the little Princess IIA bookshelfs, I started scratching my chin thinking "Hmmmm....". Could be something to look at. There is just something about the sound of electro's that I love, but there is no way I'd ever own a big set due to the various issues, but I could picture this setup in a secondary room where I was confined to a desk for extended periods.
GR Research/Mockingbird:
Possibly the most involving sound produced. I am so disappointed that a technical snafu prevented the use of the big Dodd amps. The sound they put out initially on Thursday night with the Big Blue's was incredible right off the bat. With a few hours of tweaking I think they would have given the big Wilson room some competition at a fraction of the price. Seriously. Still one of the best even with only 30 watts in a pretty good sized room.
Salk:
The first time through on Friday, they didn't do much for me. Sunday midday? Different story. Don't know if there were any changes, but the sound was very involving - it quickly drew me in. I need to spend more time with them at the next opportunity.
Odyssey:
Have to say that this room gets an incomplete. Tried twice. Couldn't hear the music over the conversations. Hope it was leading to sales.
MBL:
Disappointed. Not as good as the last two shows (NB and RMAF 2012)
Synergistic Research:
Blew me away again. Guess I ain't smart enough. No clue how little pieces of Aluminum (and other secret materials) can make a room sound so different (IMHO: Better). Probably a sucker, but I bought a couple of boxes and I'll give them a shot at my place.

Melody:
As always, one of the easiest rooms to listen to - it just seems to present a sound that lets you relax and enjoy with no apparent shortcomings. I drooled over the big tube amps.
Overall:
Attendance seemed down. Saturday was OK, Friday was down a bit, but Sunday was pretty thin. I think there were more rooms that produced "better than average" Show Sound this year. Elevators held up. Registration was quick (but I waited until about 12:15). Restaurant in the lobby still needs more capacity or much quicker turnover. Long waits for a table or a seat at the bar during prime hours.
I tried to hit every room, but a few chased me out in just a few seconds. Too loud, too bright, or just plain bad sound.
Still a Blast!

(but geesh am I tired)