I was looking at the MVC 4 release candidate and the default Internet template that is included. I noticed that in the _Layout.cshtml, they are including the jQuery bundle a
For some sites where jquery ui themes is used, it's better to have jquery and the jquery-ui at the top. That way the flash of unstyled content can be kept to a minimum.
An other technique is to hide jquery themed elements initially, but that could give an impression of a slower loading time.