Maybe so, but I'm headed to another state next week to do some dives with a bunch of divers I've never met before in person, and they are supplying me with doubles and deco bottles, and I won't even ask them what kind of valves the tanks will have. Don't need to. I know without a doubt without asking.
The very same thing happened to me just a couple of weeks ago. Met up with some divers I had never met before, but brought my DIN regs without even thinking about it, and got exactly what I expected. No asking.