No direct correlation between VO2 max and running performance

I've been searching the literature lately about endurance running and keep finding studies that instead of looking at performance before and after intervention/independent variable, just talk about VO2 max. My obvious question was: Is there really a direct correlation between VO2 max and running performance?

Looks like maybe not.

http://www.powerrunning.com/Exercise%20Physiology/Do%20Increases%20in%20VO2max%20Cause%20Improved%20Performance.htm

Good site BTW.