My very first commute this morning was ideal. A bit foggy, but about 40F, and clear roads. My commute is mostly through residential areas. On my new road bike I was already cruising as fast as I used to on my mountain bike, despite being out of shape and never even getting into the upper gears.
The commute is supposed to be about 5.5 miles, but missing the road I had meant to take, then looking for another with good bike lanes took me 7.3 miles. That said, I got there only a minute or so behind the bus that left at the same time as I did.