Iranians Upset Over Google Reader (A Bigger Deal Than You Think)
techcrunch.com
techcrunch.com
The problem with that is it doesn't tell you how important each feature is to the people using it. So while feature #2 might be used 20 times more than feature #1 it's possible feature #1 is life changingly important while feature #2 isn't something people would miss.
I'm guessing if such a conversation happened at Google, the end would be something like "Can the degree of life changing importance be measured? No? Make the change."