Obviously, you haven't measured in downtown Baltimore without police escorts, Mark .
Actually, I recently re-measured part of the Baltimore Marathon to accommodate a new course configuration requirement. For the first time for several measurements, the City provided me with 4 "motors" and one cruiser. A large portion of the downtown area was briefly closed to traffic as I measured there. These police escorts did a fabulous job. I was able to get through the 11-mile section in a fraction of the time it took when I measured here with no escort.
I agree with Pete and Paul. Unless our wobble is somehow more than the expected slight back-and-forth of our front wheel at the start of pedaling, it seems to me this should make little difference.