This has nothing to do with how many wickets he takes in this innings but just his bowling in general. He is clearly our second best front line spinner after ajmal. His control, line and length is very good for a left armer, he spins the ball sufficiently, very accurate but what impresses me most about him is the fact he pitches the ball on leg, middle stump and he always brings the lbw to play, if the ball spins it brings the outside edge or stumping to play and Ofcourse keeps the runs in check.
He was one of the main architects of the Eng 2012 whitewash and makes ajmal even more potent with the pressure he creates. He should have been given more opportunities than he got.