My guess would be that the UI is JavaScript heavy (though I haven't looked myself) - but the problem wouldn't really be the UI itself, it would be the added load on the server in handling the extra requests from all of us new users.
Most UI actions that I can see pull back content from the server rather than being rendered by the client. For example. Pressing on Notification History, Search, or even Reply on a comment sends a request to the server which will then respond with the HTML to inject back into the page. If there is a higher than normal load on the server these requests will be a little sluggish.
My guess would be that the UI is JavaScript heavy (though I haven't looked myself) - but the problem wouldn't really be the UI itself, it would be the added load on the server in handling the extra requests from all of us new users.
Most UI actions that I can see pull back content from the server rather than being rendered by the client. For example. Pressing on Notification History, Search, or even Reply on a comment sends a request to the server which will then respond with the HTML to inject back into the page. If there is a higher than normal load on the server these requests will be a little sluggish.
Yep, that's what I said, too :)