Did you know that the number of words on a page doesn’t have all that much correlation to its “thinness.” per Stephen Kenwright
Google measures good quality content with “time to long click.” Basically it measures how long a user spends with a website after leaving Google’s SERP. As most of us SEO professional do we want to know what user’s do.
Google Panda is not really a content penalty – rather a user engagement penalty.
For more detailed on Stephen Kenwright article read: “Should we still worry about think content?”