I took Rescue through a PADI shop where no one dove a long hose or backplate or knew anything about them at all. It WAS a bit of an issue -- I came home every night and called NW Grateful Diver to ask him questions that my instructors couldn't answer (which irritated him a little, since he had offered to do the class for us, but Peter wanted to do it with our local shop). However, I do think it's quite reasonable to do the class with a non-long-hose kind of shop, as long as someone there does know something about the equipment and how to manage it, because the majority of the divers we are all going to run across are not going to be diving the configuration we use.
Practicing air-sharing with a standard setup isn't bad; it might be someone with a standard setup who comes to your rescue at some point (although, IF you use it, the proactive training we get does make both incidents and the need to look to a stranger for assistance a bit less likely).
At any rate, a well-taught Rescue class is a good class, no matter what agency it comes through, and if there are specific issues that aren't addressed, you guys all have access to folks who can answer the questions.
[Joe Talavera was one of THE finest dive instructors I've had the good fortune to work with. He not only doesn't teach any more, he no longer dives . . . very, very sad.]