This image I made back in 2009 illustrates perfectly why having limited serifs in a sans-serif typeface can increase comprehension: http://i.imgur.com/Jgj17qR.

This image I made back in 2009 illustrates perfectly why having limited serifs in a sans-serif typeface can increase comprehension: http://i.imgur.com/Jgj17qR.jpg http://i.imgur.com/Jgj17qR.jpg