Why is Nozbe sooooo slow?

I’ve just come back to Nozbe, after a period of using Evernote as my sole system for GTD.

I like Nozbe (although there are still many problems to iron out).

It can take a long time (upwards of 1 minute) to load a context, and in some cases when adding tasks or projects, the icon will keep spinning and nothing will happen. When I lose patience and reload the page, the tasks or projects generally (not always) appear, but when I open the add task window again, the icon is still spinning…

Is the Ajax script inefficient or is there some other problem?

No, i’m not on dial-up, I’m on a stupid fast corporate connection. Other websites load in seconds…

Any ideas?