I have some fairly ad heavy sites and they were not hit over night. They may either be OK or not part of the 1%. I'm taking prophylactic measures however and tweaking page layouts to help insulate the sites from getting hit. I do believe that the 1% will ramp up significantly over the next few weeks. If you think it could hit you, make the changes now rather than getting hit and then waiting weeks for the penalty to "maybe" be lifted.