I'm pretty sure that could only refer to tiered link building - the present rage among link builders. Pretty much would wipe out one of the few remaining values the most popular automation tools like MS, GSA, UD, Licorne and senuke have. Only underlines that whatever becomes popular among Imers and backlinkers WILL be targeted by Google. Expected but looks like it might be a bit sooner than I expected.
OH and forums where people share link spam package techniques get a special mention to be affected. By summer he indicates people who follow that advice are likely to see problems