any ideas on this?

four months later, problem is still on-going.

Your site lagged for me as well.  I just tried it.  You can test the server performance here: http://tools.pingdom.com

I have had a ticket open for 3 weeks or so trying to resolve the same thing on three new accounts.  I am on my third server and it still is an issue.  I think it is the database.  A static page seems to load fine, but anything that accesses the database is lagging terribly. 

I've never had this problem before and I have probably 20 or so accounts on lunarpages.   The e-mail support was terrible.  Honestly, it might be that time where Lunarpages is getting too big and starting to spiral the drain.  I've seen it happen with so many hosts.