Well, it's hard to sort out, and I certainly don't pretend to have a full answer...but here's how I understand it:
OBVES, JCanon, and scholar are (more or less) JW apologists who have been around for many many years, posting on many many boards under various screen-names, and usually focusing their attention on apocalytpic chronologies. Their argumentations have been challenged and debunked by the likes of JanH and AlanF and AlleyMom and Leolaia to the point of ad nauseum. I've not personally followed much of this, because, quite frankly, apocalypticism is, for me, less meaningful than whether I'm going to have fish for dinner, or a salad.