Readability Vs Instapaper
This story (link via MR) on Economics and the MLA illustrates the difference between the Readability and Instapaper clutter-stripping methods.
Instapaper holds onto an ad at the top of the page, but gets all the text. Readability loses the first two paragraphs.
If you run Readability on the Instapapered page you get “perfect” results.
