I beat a brand new M3 last week too... Got a thumbs up for that one from the driver
The AMG driver gave me a middle finger though... ass hole.
At bandimere, I managed better times than a C6, Evo X, and a Lexus ISF as well.
All of which are cars that should have been close, or beaten me.
It's depressing the amount of drivers that waste money on a fast car just to not know how to drive it!
I'd bet good money she had no clue how to drive that AMG, and you could've beat her if you know how to drive your car well and played from a stop light.
Back on topic... Did you notice how big of a difference altitude makes?! It's absolutely crazy.