Ditto. e.g. heavier twitter users (at least the ones I follow) have better content overall, or, stuff I want to see. Otherwise I wouldn't follow them :)

The 'light' accounts I follow are mostly personal ones whom I'm interested in. This isn't a bad concept but I would rather it 'highlight' the less-tweeters among us and leave the standard ones alone.

e.g. highlight but don't detract from the busier folks. Probably proves useful for a lot of people but not for me.