I agree with these comments and thank you for the response.
I think I need to be more clear on the question I am asking.
It is obvious that you simply dont show up with a drysuit and twins to pass DIR...thats just insulting peoples intelligence. What I am trying to say is that people who have managed a certain proficiency with a dry suit and twins have had years of experience in the water to get to this level. When a majority of these folks show up for class it makes one with a single wonder...gee, do I have the water experience needed to pass such a class.
Now lets look at this statistically speaking - I would bet that there is a significant correlation between divers with doubles who pass DIR courses as compared to divers with singles. Now, having made such a statement, I have absolutely no data to run a correlation to back up such a hypothesis up. BUT, if I had to put money on it, I would say yes. Damn, I smell a dissertation here...does GUE publish thier stats??