I had a silly commuter race this morning, too. Me on 30+ pound dualie MTB, and him on a road bike. I had to work for it, and it's hot & humid. Took me forever but I reeled him in. Then we were cruising around 20MPH for a couple of miles before splitting up. Got to work all drippy and gross.
Looks like the heat and humidity are about to break for the year. I hope.