"I didn't have the heart to tell him my girl was faster tho :)"
I doubt he cares. I wouldn't. It's a DB9. Would you feel bad if some tard in a civic hatchback ran a better lap time? No. Sure you'd patronize him and pat him on the back, ensuring him that imbues his vehicle with some greater intrinsic value, but really you just wouldn't give a damn.
I wouldn't mention that unless you have some desire to be patronized and later mocked endlessly, in your absence.