The British website Classic Car and Driver took a ride with the factory test team and wrote it up here (w/ pics): http://www.classicdriver.com/uk/magazine/3300.asp?id=15228. It is a larger car overall (6" increase in wheelbase) with a 7-speed manual box derived from the previous seven-speed dual-clutch PDK transmission. The article says that a start-stop system will be standard, and I found this interesting: "Instead of a hood at the rear, the powerplant is hidden behind a ‘service door’ - similar to the Audi A2."
TT