I would be dissapointed with a 15th place finish especially if you compare this squad to the class of 2007/2008 where we finished in 11th place after being in the top six for most of the season.
Man-for-man we appear to be a lot stronger than the class of 2007/2008 i'm not sure if any of that team back then apart from Bougherra, Reid and possibly Iwelumo would get in our 101-points team. I don't remember the gulf between the Championship and League One being miles apart given Norwich and Southampton have just achieved back-to-back promotions as well. Then there are also clubs like Leeds and Brighton where top half finishes have been achieved.
I think this squad is capable of a top-10 finish possible flirt with the play-offs and i'd be happy if that's roughly where we finished.