I actually think this delay between publication and PFS legality is a good thing - it gives a bit more time for any troublesome items to get shaken out before being made legal. A slight delay now is *much* less troublesome than having to ban an item later because it just doesn't work in the strange world of organized play.
If the purpose of PFS (from a business standpoint) is to help drive book sales, this is the opposite of good. You've lost your "new shiny" hype window. Players who wanted to utilize the new content as it is published will be pushed out of PFS. The players who are consistent early adopters are, in and of themselves, large sales drivers via referral. Taking them out of the PFS population actually weakens the PFS business justification.
This is especially bad after the pre-GenCon errata backlash - you have a significant, vocal contingent of promoters (in the NPS-sense of the word) suddenly trending passive and questioning their buying decision, and a subset of them are then given an additional reason not to purchase? Moreover, you have passives floating down to detractor and that same "bonus" reason handed to them? Not a good situation.
I'm all for quality, but there's gotta be a balance of expedience.