I see small changes almost every day. It is difficult to tell if this is "Google update activity" or reflects website update activity.
Overall, I have seen no substancial changes for several months. The tweaks that worked after Florida all seem to be as effective today. The relative emphasis between on-page and off-page comes and goes. The elements that determine position among the first page contenders shift a little from week to week, but at the end of a month little has changed.
I am not waiting for a "big update", just plugging away at the known variables. Pay attention to them all and it really doesn't matter what G's flavor of the week might be.