Those that can't wait to see their midday stats points, go straight to http://www.worldcommunitygrid.org/ms/viewMemberStatHistory.do to see how much has been added from the morning session. This page is updates as the first in the list of WCG Statistics pages. Seen it now several days in a row as early 12:20 UTC.

All other pages can take 15-25 minutes more to update, particular the right hand top short info on the forums.

Edit: Only when the whole stats are complete it seems the last updated time-stamp refresh and show 12:06 UTC

edit2: Walked in Sunday noon and checked at 12:14 UTC and sure enough, the personal stats history had already updated:

Statistics Last Updated: 12/6/09 00:06:14 (UTC) [12 hour(s) ago]

12/6/09 0:003:08:05:23 8,554 13
12/5/09 0:005:02:36:28 13,301 18