Almost one week into owning my 2008 Mk5 GTI and 'fair chuffed' would be an understatement!

However, some shared experience or advice of the following would be nice..
On the overrun, about one second after releasing the accelerator, the standard exhaust gives a short 'burble' much like when you change up on a DSG, but not as loud. Sounds good, but is this normal?
Secondly, on some cold starts the car hesitates to fire up. Not a major delay, between 0.5 and 1 second longer than a warm start. Any ideas folks?
Cheers, John