Wordpress is fine so long as you have a decent host. (See not super shared hosting like godaddy dreamhost etc) The main thing you need to do is add caching to

Wordpress is fine so long as you have a decent host. (See not super shared hosting like godaddy dreamhost etc) The main thing you need to do is add caching to wordpress (both w3tc and supercache work fine) and if there is still a problem you are probably on the wrong host and should upgrade to either something like linode or a mediatemple grid server or webfaction basic plan. If you're on a VPS and have caching enabled and still can't manage the traffic I'd say something is wrong with your configuration but just looking at your site I see no caching from either of the plugins I listed.