I doubt it, at least for right now. The LGA food court has signs up that liquids/beverages purchsed inside security still can't go on the plane. It would be too easy to sneak one past security then claim it as "secure" if they really think this is a threat.

btw, I probably could have had anything in my bag and they wouldn't have checked. I left my toiletries in my client-site desk, but going through security seemed no different than usual, aside from a "no liquids" sign at the entrance.

Oh, and they did tell the guy behind me that he had to take his shoes off, as opposed to the usual "you aren't required to remove your shoes but you may be subject to additional screening" bs.