I'm a big fan of playing on whatever feels the best for the individual player. For example, I'm a big guy, but don't have huge lips, and I prefer the cut of a Schilke. In the past (when I was playing every day) I could produce as much sound out of a Schilke 13a4 as I could a Bach 1C (we won't talk about the dark quality of the sound though).
However, lately, I've been doing a majority of my playing on a Laskey 60S*. It has the ability to hold your chops in when your tired (like a Bach) but takes the air very nicely (like a Schilke). They're still not very readily available to try out at stores, but Brasswind will let you get up to 3 at a time to try and then send back the two you don't like.
Back on topic - I've always been afraid to think of telling people to play on a standard mouthpiece. With young players who don't know how to use their air properly, I fear it could end up more frustrating and disappointing than productive.
P.S. - If you want to try a Laskey for highnotes, and know how to use your air, I would advise an S model over an S* - the S* is a little too shallow for my preference, but I'm being cheap right now and haven't bought the 60S for myself yet.