When I login to the Adsense control panel, I am not seeing any impressions for today (Friday, July 18, 2003). Is anyone else getting that? Or is it just me? The ads are still being served and I know people are visiting my site today, so I am not sure why there has not been an update to the adsense control for today. Usually they update every hour, but I haven't seen an update for 9 hours.
Mine look reasonably up to date so far today, probably lagging about 2 hours at most. It is probably just a sign that they are processing payments for last month or something - maybe the further behind your stats are the more money you have coming ;)