I don't use 3 man crews any more.Yeah that's a difficult one to answer to have any real meaning. One three man crew I try to get them grossing at least a thousand a day. And I know for some people they will say a three man should be grossing twice that cutting lawns. All I can say is the route is decently tight, a few outliers that cost a little time. I'd personally shoot for a gross number if you have the rest of your numbers down.
I do have 1 younger guy. 24 yrs old.We shoot for 8 the on the clock. 30 min lunch off.
I will agree a 2 man crew is probably and arguably the most efficient. When I tried running a 2 man the problems occurred when one of the two called out or just no showed.