I think the white-rose tinted spectacles have reached a new peak with that claim!
OK, let's start with those averages. Bit different being the fifth bowler behind any combination of Sidey, Brooks, Bresnan, Patto, Plunkett and Coad on good wickets and bowling at Ciderabad. I'm not saying Leach isn't a decent bowler, but he has taken a lot of wickets in advantageous conditions.
Second, I would point out that Leach and Bess are bowling plenty of full bungers and drag downs right now. At least Dilly has the big turner's as well.
Third, White rose spectacles my backside. Rashid is... Less than popular with Yorkshire fans!