I have fools trying to pull that kind of nonsense with me all the time, too. I never get the opportunity to humble their sorry a55es, though, due to massive traffic congestion around these parts.
However... when I was on my road trip, I went to pass somebody the way I always do - lay off the gas until I'm clear, then gun it. I was floored when I looked in my rear view & the car I was passing was 100 yards behind me. My speedo was at 90 (I was probably going 55-60 when I went to pass).
I love my SVX