Thanks all!
Ok, I haven't had time to go get a new blade yet. This aft. the super and both foremen came up onto the deck to see how the TS55 works - gulp! Ok then

I was doing a test cut on some scrap 3/4 standard grade (rough) plywood - and it did great.
jumping ahead an hour or so, I set up to cut the veneer plywood. My saw did not like that! worked like a dog, growled, smoked and generally behaved badly. what happened???
I re-set the gibs, checked my depth etc. did another cut - slightly better but still working way too hard, compared to a "straight" cut.
I changed blades, but to no avail. On the way home I called my Festool dealer. He said that the blades are dull, he's seen this before. Another clue was that the top edge of the cut had some fuzz.
Whew! that's an easy fix! I guess upon reflection that it makes sense that the saw would work harder, the blade is cutting the grain of the ply at a different angle, so I think that "sharp" is critical.
The local sharpening shops are not open on Saturdays

gotta figure a work-around on that one as I'd like to get my two dullish blades sharpened. Maybe I can talk one of my kids into driving them over.....