I need someone else to confirm this. Because I believe I have discovered something surprising. And if I had known this, I would have done things a lot differently on my own site.
Google seems to favour sites that don't redirect traffic after an import... ie... It has become common practice for many people when they leave IP.Board or vBulletin to redirect their old links to the new XenForo links.
And while this does improve the initial hit you receive any time you import into another community (using the redirects); it appears that both traffic and SEO holds better results not using redirection, even though you do at first take a larger initial hit.
I'm wondering if anyone else can help confirm this or has this just be an odd and happy coincidence?!