iMac Refresh?

Apple Store went down and now is back up. Only thing I could find was "New" on the iMacs and saying now all Quad Core, but don't know if this is a change because I haven't looked at iMacs recently.

Surely they wouldn't be refreshing this quickly?
It was only May when they last updated.

No, they're same ones that were refreshed in May. I know, because we bought one.