Given the complete lack of gas management teaching in most OW/AOW combinations, the high gas consumption of the typical new diver, and the small tanks such divers are usually renting, I think signing someone off on a "deep" dive is a recipe for problems.
That's a good point. After reading stuff on here, I absolutely can't believe PADI doesn't include rock bottom gas calculations. Of course the book says to "watch your air" 100 times, but mentions nothing about what points you need to ascend and that. While a little common sense can give reasonable estimates, giving some hard number estimates would be incredibly useful.
Yes, divers are not required to respect the 60 foot limit on their original certification (and I suspect few do), but signing off on a deep dive is more likely to make people feel okay about going down there, I think, when they are really very poorly prepared to do so.
I agree, given the thumbs up to 100 feet dives this early is a problem. Doing a dive to 100 feet with an instructor on your possibly 5th open water (hopefully 7th or 8th since most will do it second day) dive with an instructor is bad enough, but being "qualified" to do it on your own on as early as the 10th dive is problematic.
I have 26 dives under my belt, not a ton, but a fair bit more than I would had I just completed OW followed directly by AOW and I don't feel ready to go to 100 feet on my own. It's not that I don't know the skills or need to take another course, but I'd just rather practice more overall and improve general skills before going that deep. My deepest without an instructor is 81, which is about the most I feel safe with right now.
Another problem, knowing you're from Puget Sound, may be that certainly PADI, I assume other agencies, seem to be very wam-water centered. All the pictures and a lot of the information is geared to warm water areas I find. And 100 feet in warm water and Puget Sound are two different animals.