Really? I’ve not seen any outlandish claims.
I treat any claim above 20mph as outlandish.
Normal club level roadie riding alone on a “normal” 50 ish miler say will be somewhere about 15-18mph. 20mph is proper quick unless you’re TTing in which case a sub 30 min 10mile is acheivable for most club level roadies.
Average race speed for a 2/3/4 cat race is usually somewhere in the region of 23-24mph (over a distance of about 50-65 miles). Average speeds for a crit race can be high 20’s or even low 30’s mph for one hour.
I’m quite lucky in that I’ve ridden with quite a few pros and unless they’re on proper team training runs, they’ll usually average about 17-18mph when out on their own as well. So when some IT middle manager claims he can average 22mph, I’m understandably sceptical.