Does my server have a heart attack when activating an Upfront theme?

Hi,

I just wanted to check with someone else. From my admin screen, when I want to change themes (via live preview) to another Upfront theme, the server nearly melts down.

When I activate an Upfront theme, I even got a server busy message.

Is there a tremendous amount of scripts being executed here? Is Upfront inherently bloated?

Thanks for any opinions on the matter.

Cheers,

Johnny