I've got the same situation, with foreign aggregators and scrapers ranking ahead of ever new article I put up. Now lest you say it's about links, I can give you examples where my smaller, less authority, clearly vacuous sites in the same niche are going gangbusters and getting ranked well without a link or tweet to their articles. The authority site that was hit has links, has tweets, has FB likes, has a huge link profile. Yet it is outranked by aggregators for fresh content. The aggregators I am seeing are foreign, with link backs to my article. How does that make sense?
@Jeff, one article I refer to has links to studies on the subject as well as to media articles (for reference).