But in practice what is the average encountered in all or most tournaments? Or even a distribution for high endish , low endish, middling value? And which of those is prevalent?
This page will let you see every tournament that was rated in a particular state in a particular month. It takes a little effort from there to click through and see what the time ...
Rapid ratings cover a very wide range of time controls and bump up
against regular (where games are dual rated)
It is perhaps worth spelling these out for those outside the US who are unfamiliar with USCF time controls. According to the USCF's Official Rules of Chess (thanks, DM, for the link!):
5C. Ratable time controls.
There are three rating ...