Yeah I think UConn women would beat 99% of the boys HS teams. Maybe something like Oak Hill Academy whos HS front line goes 6'8, 6'10", 7'0" would beat them, but a normal team from a school of a couple thousand kids would get crushed. Like my old HS was 2nd place in the state of Wisconsin this past year. I watched the title game. THey would get killed by UConn's superior shooting, team defense and ball handling. Their front line was only 6'1", 6'3", 6'4" though.
I've played with some female college guards in men's pickup games, and they can play. Sure, they can't drive and score in the lane like men, but a 5'10" PG isn't supposed to do that. On defense, dribbling, shooting perimeter shots, etc, they is just as good as a man. And most of the women learned playing vs. brothers so they know how to get a shot off to avoid getting blocked.