We are working on a major stats rewrite and this include more detailed and faster historical information. Daily, Weekly, Monthly, YTD, Referral, Keyword, and past 365 stats will be available in less than a second. To do this is taking a lot of number crunching on a lot of servers. Sometimes it slows things down more than we would like. This will not affect how your stats are calculated just how they are stored for future use. So yes, today's stats are a few hours behind, but that's why we put the last updated time on the front page.
We just got the information for yesterday's stats so we are trying to get them out first.
Donny