In my opinion something's up with his face that makes him look wrong for Spock. But what do I know? Everyone loves Quinto because he's a hot commodity right now.
*sigh* *shrug* Maybe he nailed all the "Spock-isms" in his audition and maybe when the movie comes out he'll look perfect on screen. All the Daniel Craig doubters ate their words after the release of Casino Royale, after all.
I just can't escape the feeling that Quinto, like Shia Lebouf for Indiana Jones 4, was hired partly because he's the "hot new thing" right now.