Maybe its time we all flood wizards with this question?
Can we get some specifics of what "basic", "standard", and "advanced" actually mean in a practical, how-are-rules-presented-in-the-books sense?
Eh... I suspect it's still too early for them to give us a good read on at least the standard/advanced delineation. While it appears (from the small tidbits we've heard from them recently) that the "basic" game might be relatively set from a rules standpoint... how or why some rules end up being standard versus advanced are probably still up in the air, plus they probably haven't even begun to work on book layout at this point. And once that organizational tactic gets put into place... that could have a profound impact on the delineation too.
Some rules they might think in their heads are meant to be "advanced", but then once they lay the book out they discover that they needs aspects of those rules to be standard because there's something missing in the explanation. Or they have a rule set up to be "standard" with a whole bunch of variants of it planned to be "advanced", and they then figure out that even the standard rule isn't necessary and they ALL get moved to "advanced". Or any other permutation like that.
This is why I do my best not to get all worked up when they demarcate certain rules to certain versions of the game at this point... because the truth is once they decide (if they decide) to release a public playtest packet that is actually formatted in the manner the actual books will be published (so that we can look for spelling errors, missing page numbers, wrong monster stat calculations etc.), THAT'S the point where they will find out where many rules should fall in the basic/standard/advanced scale according to all the players out there.