To be fair, you have to give him bonus points for having to play alongside the mess that is Gary Cahill.
If you had asked a stranger to the England team and it's players who out of Smalling and Cahill is meant to be the older, more experience centre back, they probably wouldn't have a clue.
Smalling is a much better centre back when playing alongside Vidic or Rio, as he is still young and they have experience to lead... and of course there is obviously nothing wrong with that.
Mind you, he also looked impressive when he's alongside Jones, but thats probably due to them being familiar with each other?