My average pace changes with each ride depending on terrain, distance and elevation. I think I might have posted on that thread you mentioned, but I'll repeat just in case. Today I did what I called my "speed" ride. A semi-short distance that I pushed myself on for speed. It was 12 miles at 15.5 average pace. My last "long" ride was 25 miles at 14.9 average. On the tandem the other day, up some good elevation, I was REALLY pushing more than I have before on the tandem and we did 16.8 average. I go faster on the tandem than my single, while DH goes slower!

I might be a little faster than you, but I'm the slowest person I actually know who cycles, so it spurs me on to get faster and keep up!