A recent question from a new measurer:
he asked if speed makes a difference in the quality of your rides. Because of high winds and some downhill sections, the measurer was approaching speeds of 20 mph. His first two rides were not within acceptable range. So he made two more rides, this time slower and they did agree.
Note: He is aware of the recommended speed max of 15 mph for the Jones Counter and that the best 2 of 3 rides would work.
Did speed make the difference or was it increasing familiarity with the course?