I just had my 30K service on the 4.8is. Wife mainly carts around the kids, so I hadn't really noticed. I have been driving it this week, and paid close attention for the last 2 days...

The "braaap" exhaust note on startup is gone, and replaced with something much more subdued. Warm or cold, it's gone, and even more subdued when warm.

Some kind of software update performed during service?
Anybody else noticed the same thing?

I got so many compliments on that startup sound, and even the wife had taken a liking to it. I feel robbed.