My commute is 6 miles each way. It takes me about 24-25 minutes in the morning, (more down-hill)...and about 30 minutes in the afternoon, (when I pull more hills.) Some days are better, but that's the average. I ride a Giant Cypress setup as a commuter bike.

Speed isn't everything, but it does make the trip more interesting to watch your stats. I recently picked up a cyclecomputer Sigma BC600, and I realized my route was a mile further than I thought! I must have been peddling "country miles" as my Daddy used to say.

I put more emphasis on the speed getting in to work, and relax a little on the return home.