Formally, yes. However PADI has over 100,000 instructors world wide, IIRC.
We are in a transition period right now. There are a truly VAST number of instructors who are either unwilling or unable to make the change. Many have not even been exposed to the idea yet because the don't read (contrary to standards) the training journals and they are not active online.
Some.... many, perhaps... would LIKE to make the change but lack the support necessary to learn how to teach the OW course in a neutral manner. This is by far the biggest group. Among my close colleagues I am the only one who has really let go of his addiction to the bottom (and have for a number of years). The instructors around me who see me in the pool every week range from "interested" to "trying some stuff" to "wanting to gain buy-in" to thinking I'm a heretic. For example one even sent me an email this week when I asked the group for an opinion about something I wanted to try that I shouldn't start, "moaning" about this again......
Change is hard and even good instructors, when being shown on a weekly basis by someone (me) willing to teach them how to make a paradigm shift, most are still hanging back and waiting for their vindication if/when I make a mistake. Meanwhile the results in my OW course are utterly spectacular but even that isn't enough to convince them all. Just imagine how it must be for the 90% of instructors who don't even care.
It's incredibly hard to get a large group to buy in to a paradigm change if they don't first experience a cognitive dissonance. As long as instructors continue to get "reasonably good" results (or even BAD results that they are happy with) using inefficient training methods, they will not feel inclined to change.
Strangely, it's the most experienced instructors who find making a paradigm shift most difficult. Recently I was working with a freshly minted DM (a 19 year old woman) who took to the idea immediately and by the end of the course said that when she becomes an instructor this is the method she wants to use.... and this is the rub. There are maybe 90,000 instructors out there who don't get it and with a little luck maybe 10,000 upcoming DM's who have seen this method......
I'm still hoping for a paradigm shift. I'm hoping for a moment in time when every instructor (like i happens so often in science) says, "OH SNAP".
Finally, I should point out that the movement to make this transition started right here on Scubaboard. A small number of instructors, lead by
@boulderjohn were able to convince PADI that (a) it was possible and (b) it was necessary. As a result the standards were tightened up and the course improved.
Now it's on our shoulders to make it happen for real.... and I'm finding it..... hard.
R..