In the match between Pakistan and Canada, though Pakistan won it, there is a worrying factor there.
Naved-ul-Hasan gave away 43 runs in 7 overs at an economy rate of 6.14. He got only one wicket. Afridi, who I believe is going to play an important role in the Pakistani bowling line-up, had an economy rate of 5.33. I am not sure how the wicket was, but these are certainly not good signs for Pakistan.
http://cricmagic.blogspot.com/2007/0...ve-reason.html