Utter nonsense. I'm not the guy's biggest fan, but to take one game alone, watch the Dnipro away match and come back and tell me he didn't make one outstanding save in that game.
For a start, to go from the scenario that you have one of the greatest keepers of all time telling you that you're a good keeper to having Colin Meldrum telling you that (that's Colin Meldrum, someone who's still young enough to play, but is only signed as a coach ... perhaps tells you something about his playing credentials) may effect confidence.
Langfield was ropey as fuck when he first signed for us to the point Derek Soutar got a game ahead of him. He really matured last season and I thought he was very good. Not Jim Leighton or Theo Snelders very good, but SPL very good.