The metrics being used in the article do not have any basis in reality. The number of domains associated with a name server are not representative of the number of domains transferred. Godaddy could have transferred 100% of the domains they have associated with their parking name servers to domaincontrol.com nameservers and it would have looked like hundreds of thousands of domains transferred in by this metric. Any domains that didn't use godaddy's nameservers to begin with are also not represented in this abuse of data.
Not to mention, there's no reference to older, pre-SOPA data anyway.