You may want to read up on the server changes that the programming department is still working through -- there's a topic on it over in the Announcements forum. As we (Subeta) work out the kinks, site performance should pick up. :) It's a process, though, so please bear with us!
In the future, we kindly ask that you please not submit bug reports regarding site lag. The staff is also on the site and experiences it just the same as everyone else, so we know when it's happening and you can rest assured that we're trying to get it fixed as quickly as we possibly can. Nobody likes lag, and that includes us in a big, big way!
Thanks for understanding, and for your patience as we continue to work on improvements. :)