Agree, not surprising given the 30mph wind. I'm still not throwing avg speed out the window because I rarely encounter 30mph, but it should be pretty obvious to anyone riding with that variable condition that your power's going to be drastically different.

(I have a lot of mts where I live so I don't think I've ever ridden directly into a 30mph headwind - the canyons tend to block the wind.)

Give a 5mph wind speed, and I'd be a lot more curious to see how inaccurate your avg speed is for both efforts.