While Apple is surely more relaxed than it used to be when it comes to the NDA, I can’t help but think that it is still in place just so Apple has something in its back pocket if something truly crazy ever happened. It’s a safety net, in some respects, like patenting any thing the company’s employees can think of. The NDA is more defensive than offensive at this point.
I figured Apple would use the NDA to nuke idiots who review betas three months before release time, but that doesn’t appear to be the case. It doesn’t make sense if they don’t enforce it.