Site performance in WMT

[hugh]

These charts seem to have just become a little bit less vague but only slightly...

[tedster]

That correlates with this March 9 post from Google employee sreeram:

...we are making some changes to the algorithms and pipeline behind the site performance feature and so had stopped updating it for a bit. We'll resume the updates soon, hopefully within a day or two. Do stay tuned and keep giving us feedback.

[google.com...]