Hello,
This is absolutely not true, the content tab has no effect on startup or shutdown time. Nothing loads until you access the tab.

CP is available directly from http://www.contentparadise.com. There is free content available to everyone, for example this and this. Or do a search on free, or click the "free stuff" link....we're also working on and adding tutorials, more free downloads, two more contests, developer support, and some more interesting stuff like ercs, and jcm's.

Thanks,
Steve