Okay, it's definitely getting closer to the end of summer. Mid 50sF with a northwesterly (tail) wind. Overcast.

I reeled in a guy on a hybrid. He was doing about 14 on the flats, 12 up any sort of up-incline, and 16 on down-inclines. So I let him pace me to avoid breaking a sweat. Or breathing hard. Eventually a roadie with a pannier caught us and passed but he wasn't much faster.

In summary: No-exercise commute + tailwind + Friday = Win!