It's definitely quick... and there's something about the way it's quick that's really satisfying. I can't speak to the TDI, only the TFSI, but driving the car, it really feels like you have all the power you need and the ability to get it on the road effectively. Makes daily driving, dealing with traffic, on-ramps, cross streets a different experience.
It's a fun topic to watch people get torqued about (pun unintended but tolerated) -- a new review cites a 4.8 sec 0-60 time.
I have no idea if it does 4.8 vs. 5.8, but it's a lot faster (and jarring) than the 2012 Jetta GLI I had last. That car supposedly does 5.8, but the SQ is very different experience. Plus it keeps going very hard way past 60.
Now, the first time I went to the gas station after having driven not so many miles... oh well, no such thing as a free lunch. That's where I'd be pretty interested in the TDI version.