I don't equate riding speed to superiority.

But yea - there are a pile of race classes that are supposed to be so because of the general speed differences. Of course there is also a lot of overlap. I like the idea of not having classes based on anything but ability, but they didn't ask me. Still, for speed/competitiveness in the USA this seems to be true.
M Cat 3 ~ M Junior 15-16 ~ WP12 ~ M60

And the same can be done for many other categories.

Also average for the category relative to other categories is not the same as the top few in each. I expect the top 14 year old boy to be faster than the top woman. I expect the average 14 year old girl to be closer in speed to women pros than 14 year old boys are to male pros, being girls peak earlier. The training time (average) between the genders is quite different, as are the length of the races.

Groups also race differently. It is pretty easy to get these numbers looking at Strava. For example in a crit pro women, very capable of racing 24mph, will often race laps in the teens, or you can find races where lap speed varies 4 mph or more. Pro men have lap speeds that vary less and junior boys go full gas and every lap is as fast as they can go.
So while a woman Pro may be as fast as the 15 year old boys - the P1 crit average speed will be slower.