lucy24 - 4:49 pm on Jun 22, 2012 (gmt 0)
Conversely: If you have a page without tracking code, and people go from there to a page with tracking code after entering the site on the without-code page, it will look as if they entered your site "cold"-- as from a bookmark or type-in. To me that comes out looking positive; it means the site is getting word-of-mouth and not just search-engine hits.
That's assuming Google Analytics interprets data the same way piwik does. I know it took me a while to figure out why analytics and logs seemed to give different information.
It's also assuming that Google interprets things the way humans do. "This site must be good if people go there on their own" versus "They don't need us, because they'll go there anyway."