man! I did not know that just upgrading from 105 to dura-ace would make a rider faster!! I'm in! :-)
I guess I did not put it right, on my old 105 cassette I had bigger sprockets, more like for hills, and in the city there almost no hills to speak of, bridges being the hardest ones, so we installed a set for faster speeds. I had tough time cranking it last night :)
we are going to have to start calling you Lance. Consider yourself lucky thats its flat. The hills around here can be too much after a while.