I have been using zapreader at www.zapreader.com/reader for years now. Sometimes on the weekends I take about 20 long form articles and put them into the zap reader js form. I find that I get the main idea of an article much faster, I notice patterns better when I read at that speed. I wish amazon would incorporate this technology into all the kindle reading apps, instead of "features" like how long I have left in a chapter.

One hack for easily putting the articles in to zapreader is to look for a print feature. When the article has a print lay out it is easier to copy and paste the text.