So, it may have started out as a reporting issue, but, in many cases, automated bid software will have kicked in as soon as the first page bid's were cranked up.
I'm in a weird situation in that I raised most of my bids, then reduced them back to normal after 24 hours. My impressions are down somewhere between 31% and 45% of where they were prior to the bid raise.
I've got to wonder if this is a glitch, or, if I've been out priced by competitor's campaigns that are reacting to the new first page bids. My campaigns are definitely going against all the really big PPC players, who do run automated bid software.