I bowl one occasionally, it does nothing off the pitch. However it drifts enormously due to the Magnus effect - the same phenomenon that makes a topspinner dip and a flipper float. Its very hard to control due to this.
I haven't bowled one in the nets yet but I thought it might get a lot of drift. I'll have to give it a go.
I think you're being grossly unfair, he's got a lot of tricks and he uses them wisely. I think he'll take another hatful this season like last season, and to be fair to the lad he does average 40 with the bat...!

