It seems to me that there's a proper place for both the objective and subjective measurement of speed. The velocity at which I can maintain control has gone up drastically since I started, but in a real way my subjective sense of 9/10ths hasn't changed all that much.
I have no idea how fast I've gone, and I'm not sure I care all that much except as a measure of my improvement in skills. To me the exitement is about the sum total of acceleration, how quickly things appear to be moving past me, and how far I had to stretch myself to get there. That's all gonna depend on where I'm skiing that day.
If I'm adrenaline rushing at the bottom of the run then it was fast.