From day one, I always suspected that my headlight aim was high and I also had the same reaction from oncoming vehicles.
I just mentioned it while I was at Crewe Audi but I was not sure if it was high or a side effect of Xenons.
When I got the car back, the beam was more 'normal' and no-one bothers any more so they must have adjusted them.
I am positive that I have read that this is a common factory setting issue but I cannot remember where I read it.