An updated Google Webmaster Help thread has confirmed reports from Google’s “sreeram” that Google is updating the Site Performance reports in Google Webmaster Tools.

During this update, Google has temporarily stopped updating the existing reports. The Googler said:

One new feature I am expecting is a trustworthy indicator to be added to the tool. I also suspect the tool to update more frequently and possibly offer better explanations of what can be improved.

Forum discussion at Google Webmaster Help.