Felton has clutch on his resume going back to his college days, making some big plays in the final minute or so of the NCAA finals (schooling Deron Williams in that span) en route to an NCAA championship. Beyond that, other than some games here or there (remember last year's games against the Knicks?!), you don't really get to call that out since he hasn't been on a lot of teams with a chance to be really good.
This team has that chance. He's got weapons all around.
Steve Nash in his mvp season (62-20; previous season 29-53):
15.5ppg, 11.5apg, 50% FG, 89% FT, 3.3rpg, 1.0spg
Nash's Second MVP year:
18.0ppg, 10.5apg, 51% FG, 92% FT, 4.2rpg, .8spg
Felton (through 19 games 10-9; previous season 29-53):
18.2ppg, 8.1apg, 47% FG, 90.5% FT, 4.1rpg, 2.0sg
Felton's numbers are in the same neighborhood of Nash's first MVP year - not enough for anyone to say one is clearly better than the other statistically - or particularly if you take into account their defensive play.
They're also comparable to the very best in the league this season (maybe with the exception of Deron Williams, who is averaging 22ppg/10+apg, and Derrick Rose - averaging 26ppg/8apg).
Granted, the Knicks would need to go a remarkable 52-11 (unlikely) the rest of the way to match what happened with the Suns, but if the Knicks could get close to 50 wins this year, I'd say D'Antoni could be a strong coach of the year candidate, while both Felton and Amare could be up for consideration for MVP. (Chandler, if he comes off the bench enough, would be a strong candidate for 6th man)
At this point, Felton's outperforming my statistical expectations of him. I predicted a conservative 16ppg/8apg, with shooting numbers more in line with his career averages. He's just beginning to look comfortable in this system, and based on his numbers from the past 5 games, he's really just starting to take off. I'd expect him to improve across the board as the year goes on.