Typically, Google updates the reports within Google Webmaster Tools daily but it typically is two days behind.
Right now, the reports have not been updated since August 2nd, which puts us currently six days behind schedule.
Google has had delays before with Google Webmaster Tools, so this is not new.
Google's Gary Illyes from the Zurich, Switzerland office responded that Google will be looking into it.
He wrote in two Google Webmaster Help threads:
Thanks for posting! I let the engineers know and they're going to take a look.
So if your reporting is delayed, do not panic, it is everyone.
Forum discussion at Google Webmaster Help.

Comments:
Chase Anderson
08/08/2012 01:42 pm
I've only got data from 08/01 so I'm at 7 days now. And the karma monster made the data more important than usual for me so it's been extra painful.
Drew Pokoj
08/08/2012 05:41 pm
I noticed when they launched the backlinking data (as shown in your image) that this data has a longer refresh period than other data in webmaster tools. This was tested on a brand new site that was showing search query data, but showed 0 sites in google index (via webmaster tools new backlink graph)... maybe they slowed down the refresh rate overall... thoughts?
Nick
08/08/2012 06:50 pm
Some Webmaster Tools data has always been slow or terribly out of date. For example, until recently, incoming links were updated very infrequently. I still see a few links from sites that went offline several months ago. Google+ audience info seems a bit odd lately too - showing zero +1s for some. Lots of changes in WMT lately so I guess this is to be expected. Overall, WMT is starting to be a haseck of a lot more useful than it was.
Alan
08/08/2012 09:57 pm
Webmaster tools data seems to be so hit and miss. I have had things go viral and appear at the top of a search term and it never ends up showing in Webmaster tools. I see the hits/searches in the logs but Webmaster tools never reports them. So I take webmaster tools data with a pinch of salt these days.
Murthy Seo
08/09/2012 04:37 am
I have got Aug 4 date stats only still.
sanket patel
08/09/2012 06:16 am
I agree with you completely.I have also noticed that sometimes Google take much time in order to show its latest updates.
Sara
09/02/2012 06:47 am
My Google Webmaster search queries has gone down to 0, but traffic is stable. Is this connected?