I've watched about half the Kings games this year and I've seen Scrivens play twice in person at Staples Center. He DOES look better individually than he did with Toronto, and I think he will challenge for a starter's job if he continues to develop. I know he's older than most up-and-comers but he's a battler and understands his position extremely well. His numbers are certainly inflated due to Sutter's system and personnel, much like Quick's are.
Bernier and Reimer are certainly more talented than Scrivens though, and I believe both are established number ones (can't wait for everyone to scream at that) while Scrivens is battling to establish himself as a starter.
He's still brutal with the puck on his stick, but his rebound control has improved markedly. If he can prove that he's not just on a hot streak and that he is capable of this level of play then I think he will have a nice NHL career.