Thanks, all.
With the nicer weather upon us, we've (OK, I'Ve) had a chance to get on it a little, with some fun 100-240kph runs (on a closed track, naturally.....

).
I'm noticing that when I'm on full throttle, and it's shifting at redline, just as it shifts, I am hearing this little "pop", or "puff", from the exhaust. This happens when I am in "non-M" mode (M button not engaged), and with M button pressed.
I actually think it sounds MEAN, and kinda like it, but just wondering if anyone else is getting it.
BTW - this thing is crazy fast for something that weighs this much!!!
Love it.
thanks everyone.