Congrats on your new Q60, great car, take it to the dealer !!
I have a '16 Q50 Red Sport, bought a year ago this month, I love the car. The 3.0tt is a fantastic engine, and Infiniti has underrated them like BMW does, they are beasts.
I have not experienced anything like you describe, and I've had the stock Red Sport exhaust and changed to the Infiniti Motorsport exhaust a few months ago, no white smoke or excessive dripping.
Take it to the dealer, best of luck............