Well I could tell you my average, but I'm not sure if it will mean much to you. I drive 7 miles every morning to school and it takes me about 22 minutes. I guess it comes out to be about 19 mph or so. Truth is that some days I might catch a lot of stop lights and also cars might be jerks. Also, my route is fairly flat with the exception of a catwalk I use now and then. Too many variables though, I have to agree with the rest of the group. I'm more interested to know TOP speeds. Mine is 30 mph on a single gear, so I just want to see what top speeds are possible on multi gear road bikes.
Guess I'll run a search, good luck Mike, keep up the biking!