Clicking on a link or submitting a form in the control panel is extremely slow. At times, it's almost unusable. The pages load, and the forms get submitted eventually, but it can take five minutes.
I'm glad I have not had any big reconfig or setup jobs lately where I have had to change a lot of settings, because it would take many hours at the rate it refreshes.
I'm sitting here right now waiting for a mail-edit page to load.