Don't understand this criticism of Hargreaves?

Everyone keeps taking issue with his height.Assuming the heights are correct...Ronde Barber  5'10"Darelle Reavis 5'11"Vernon Hargreaves 5'10"/ 5' 11"?While Hargreaves speed in the 40 is a bit slow no one can deny his coverage abilities on those 3rd and long situations.  In my opinion he was the best cover corner of the draft on tight coverage.JMO but far too much is being made of height given the success of the 2 all pro players named above him.