I've been reading threads like this from both sides for a few weeks now.
DIR's name was marketing genius, however, some (not all) but some (as is true of any cert) DIR divers are arrogant and throw this around as if others aren't worthy. The same can be said of divers from other agencies.
Experience really does mean something. I've seen some DIR divers that thought they were it. Their diving showed they had a long way to go, but that is true of any "new" diver no matter what their certification agency. Just because you didn't learn DIR (and many divers have been around longer than it has) doesn't mean they aren't doing it right, they are just doing it differently.
People do die while diving. Some agencies and instructors attempt to turn out large numbers of divers quickly at the expense of proper in-depth training. This is probably part of what started the concept of DIR. These inexperienced and often-time undertrained divers are usually the ones you hear about in the news. For the over 2 million divers in the United States and Canada, DAN recorded 89 deaths last year. The numbers (proportionally) are rather small. This would indicate that a vast majority of divers (from any agency) do well enough to keep themselves from getting killed, but some work still needs to be done.
For different people there are different agencies. Everyone is different. A standard gear cofiguration is helpful, but so is knowing your gear and your buddy's gear. Doing a gear check and review before every dive was taught to me as standard practice so the only reason for not knowing where your buddy's inflator or octo was is just plain laziness. "Standard" gear is only standard until someone decides they like something else a little better or until something truly better comes along, then you are stuck between some that have upgraded/changed and those that haven't.
Bottom line...I'm a diver. Most of the people on these boards are divers. I'm no better than anyone else here and none of you are any better than I am. I may have more experience than some and I may perform certain skills bette than others. On the other side, many of you have more experience than I do and probably perform many skills better than I as well. I'm not going to kill my diving experience just because of an agency name. I'm also not going to dive with someone who thinks they are it, no matter their agency of choice - the "I'm better than you because of xxx" attitude is dangerous in any diver (or pilot as we are taught). It doesn't matter the agency, it matters about who the person is.
Diving is about having a good time and seeing and doing things together that other people don't see and do. Its about the stories and the back-slapping during the SIT and the meal at the end. Its about coming back here and telling everyone how great it was or what you found (and posting those pictures I have so much fun looking at).