As for the "hotter" motors, I don't know exact details. I just get to drive them.
Regarding the release, again, still looking pretty good. But it's impossible to say for sure until they are rolling out the door. Any kind of little problem can cause delays. The boxes being late, the manuals being late, things that are out of a manufactures directl control. But so far it's looking like all the ducks are in a row. People shouldn't be so upset by delays, no manufacture Wants to delay things, but its necessary sometimes.
With the fan installed directly on the heatsink of the GTB, it is "about" the same height as the Super Sport is now. If anything a touch shorter I'll see if they'll let me post a couple of pictures, but I wouldn't get your hopes up...