diberry - 6:08 pm on Jun 10, 2013 (gmt 0)
I believe Google used to give domains a ranking boost for being a certain age, and in the past year or two they have reduced that boost or maybe taken it out of the algo altogether. If so, this would mean some older domains lost a factor that was helping them more than they realized, while domains like Netmeg's simply had enough else going for them that they sailed through without noticing any difference.
Loss of a boosting factor could look a whole lot like a penalty to the webmaster. That's yet another reason why it's getting harder to diagnose any site's individual problems.