After being surprised by essentially the same time taken during the 20 km commute with the fairing compared to without, I am thinking that any gains on the flats is being lost on the climbs. Hmmm, isn't this how the Tour de France is won? LOL.

The fairing only adds weight and does not assist during climbs and except for small portions of downhill, the second half of the commute after the bridge is pretty much uphill. Sooo, after putting my daughter to sleep, I went from 66 gear inches to 62 inches. I will ride this this combination for tomorrow's commute and see whether my time improves. 62 is also a magic gear so no chain tensioner needed. Regardless of time taken, I'm a lot more comfortable behind the fairing. A lot. This benefit should not be underappreciated.