Joe,
That's not a bad idea. This poor guy was trying to learn and when we got on the boat, he wasn't even sure how to put the regulator on the tank.
And then he had the instructor bitching at him about the low pressure/power inflator hoses. The guy had them both velcroed. The instructor looked at him and goes, "No no no. That's not right. You've got to have this one velcroed, and this one out." Proceeding to velcro the LP hose and leave the power inflator tube outside the velcro.
Now I know that's really a personal preference but come on - yelling at him and barking some ridiculous half-cocked nonsense?
I guess I was spoiled. My instructor for OW was very good, and very patient. And my AOW instructor (the shops owner) has over 10,000 dives in his career. So I felt very safe and very confident in my skills.
I think you're right - a detailed survey of some kind about the instructors should be mandatory prior to issuing your c cards. It might change the environment some and put the instructors in a position to really have to make sure people are comfortable in their skills.
Robert