It is early on but I'll give my rating based on his first 9 games.
I'd give him a 6/10 so far. He has great distribution, he commands his defence well and he's willing to come for a cross unlike his predecessor (sp?)
He's not really had a big test yet as we don't tend to be put under a great deal of pressure, but he's looked a bit shaky from the long range shots he's conceded. I feel he should have done better for the goals against Wednesday and Swansea. I'd say I like to see him tested properly, but it would be a lie as I don't want to see us put under the cosh alot! He has made some good reaction saves in these games though, which shows he has good reflexes.
He certainly has potential, but is by no means the finished article.