Personally I think that for the basic certifications (such as PADI Open Water Diver) all the instructors and DMs should dive the same or similar gear as the students does and donate the same air sources the students does and so on. Its easier for new divers
I believe if I was running a beginner class I wouldn't want a DM in tech gear and hog set up. Students look at their "instructors" be it a DM, AI are the real instructor, how and what he-she dives with. Diving is new to them and a learning curve. They need to get that down before they get mixed signals....Again the key word here is beginner students! They have a learning curve. I would not make it harder than it is.
To use something different runs the risk of confusing them.
So, do y'all ever teach a dive class that does NOT arrive at the pool on a short bus?
You all seem to assume your students are slack jawed morons. If they're truly that easily confused, you should switch to training collies and poodles - it'll be a step up in the level of learning.
Realistically, there are two student responses to instructor gear:
1) "What, the instructor had gear?" These don't notice the instructor's gear, and pretty much don't notice much of anything. They probably shouldn't be diving because their situational and environmental awareness is too low.
2) "I see your gear is a different - why?" The students who generally DO notice are generally curious, but will readily understand an explanation behind the differences. The only real issue is not taking up class time with answering their questions, and if you tell them you'll answer after class, maybe over coffee at Denny's, that problem is solved.
Either your students are NOT drooling idiots, or you're not helping the sport by training them. If you operate as if they were idiots, you need to ask yourself why you can't get better students, or why you can't respect their intelligence.