Maybe if you take into account riders who are going for the equivalent of stroll on the bike, but not for people who are trying to keep up a reasonable pace. I get passed by quite a few people. I tried the Toronto "donut ride" a few years ago. It starts as a social ride and speeds up for the last part once you have reached a particular highway. Despite my best efforts, two minutes after the highway I was a very lonely person! So I don't consider myself to be that fast.