OK, I'm going to show my bike mechanics ignorance here. Kind advice will be appreciated.
Early on a club ride tonight, I hit a big pothole going fast and immediately afterwards I felt increased resistance. Nothing seemed to be terribly wrong, though I did wonder whether a spoke had broken or a rim cracked and how I would know without stopping to inspect (should I have?). Anyway, I completed the ride without incident. It was (for me) a very fast ride, averaging about 21 MPH over 29 miles. I did more wheel sucking than I might have otherwise, in part because my bike now felt just a little slow.
Anyway, after the ride I checked the wheels - there are no broken spokes or rim cracks, but the rear wheel is now out of true, and I'm pretty sure it wasn't before the ride.
How much effect could that have on the bike? Does an out-of-true wheel generate appreciable aerodynamic resistance?