martinibuster - 3:05 pm on Jul 12, 2013 (gmt 0)
Hey Eric, welcome to WebmasterWorld!
I don't think this applies to simple attribution links for guest posts on high authority sites
That is where the gap is, isn't it? Let's take this a little further and explore the gap to see what's in there. ;)
1. Google will not make a whitelist of sites to exclude from a do-follow links guest post penalty.
2. A do-follow guest post penalty would unfairly penalize articles with no SEO intent, like no high authority sites.