I would separate the not ready for DM crowd from the not ready for AOW, Rescue people. DMs are diving professionals, and should have the skills/experience to back it up. I was one of the 20/60 DMs... and you could tell. Luckily I got a mentor who taught me to become a dive professional, and got me through instructor. Was it a mistake to become a DM that early? Maybe, but with my buddy's help. I think I turned into a pretty decent instructor.
As far as the AOW/Rescue progression... the earlier the better, I just think the names for the course's are deceiving. Look at what you actually do in AOW; a navigation, night, "deep" and a couple of optional dives. Nothing really "advanced", just more experience diving with an instructor. As a former instructor/potential buddy, I would much rather dive with someone on their 10th dive who is an AOW than someone who was just diving after OW. As far as Rescue goes, if I remember correctly, (haven't taught the class in a while), most of the skills are on the surface. Again, the more experience with a dive professional, the better. These skills shouldn't be in the hands of only a few "elite" divers.
Now if you really want to get me going, tell me that I should be respecting a PADI Master Diver. While their skills should be a little higher than most, really all a PADI Master Diver is, is a person who spent a bunch of money on over priced specialties (What the heck is a Night Diver Specialty?)