I just found that this has been discussed mucho in the archives. The consensus was that only HSS and Mindy Blake swings were not toe up to toe up. (But there was dissent of course.)
It's funny, though, that in some of the earlier NG materials I've seen, even photos of Todd Graves in their book, the clubhead is shut at the top ala Mindy Blake. It seems to depend on the era and maybe even the instructor at NG?
To be that shut at the top, you'd not likely be toe up at the normal parallel checkpoint in the backswing.
I'm asking because I had a GREAT range session using the Mindy Blake swing (Version 1.0), and I was noodling on if and how that arm motion might have been incorporated into a regular SA swing. From the archives it sounds as if most who did something like that ended up fighting hooks.