If goal difference comes into it, it's too early to tell who will have the worst come the end of the season. If someone, e.g. QPR against Chelsea or Burnley against Arsenal, gets a tonking it could change things. Hull have a better goal difference than the other strugglers but other than that there is not a lot to choose between the "contenders." By and large (famous last words) we haven't been spanked this season with the exception of the 2 games against Arsenal, and Chelsea away.