I do believe that the semi-unofficial standard of fitness measurement is to do a century (100 miles) in 6 hours or less.
Last time I rode an organized century, there were ~400 participants, of whom exactly 7 managed the full 100-mile distance in 6 hours or less, and median finishing time was around 8:15.
But maybe Nova Scotia is flatter. This one had 9000 feet of climbing.