Honestly, I'm a bit disappointed that Payton made the 1st team over Smart. Especially that he made it by such a significant margin.
I mean sure, looking at their Per 36 stats it looks lie Payton had the better overall season, beating Smart by a significant margin in Assists, Rebounds and FG%:
Payton
10.6 points, 7.7 assists, 5 rebounds, 2.1 steals, 0.3 blocks, 2.9 turnovers, 2.4 fouls, 42.5% FG, 26.2% 3PT, 55.1% FT
Smart
10.4 points, 4.1 assists, 4.4 rebounds, 2.0 steals, 0.4 blocks, 1.8 turnovers, 2.6 fouls, 36.7% FG, 33.5% 3PT, 64.6% FT
But it's not completely one sided. Smart shot significantly better from three and from the foul line (where Payton's numbers, for a PG, were almost historically bad) and I was also impressed by Smart's low turnover rate, which is a rare (and very impressive) feat for a rookie PG - especially one who wasn't really recognised as a great passer or ball handler.
Smart also had the slightly better Real Plus-Minus stat, though it was close enough that you may as well call it even.
But none of those individual stats are the ones that swing it for me. The thing that surprises me about this selection is that Smart started at PG for a 7th seed playoffs team. Not only did he start for a playoff team, but there is plenty of evidence out (both by eye test and statistical) to indicate that Smart had a LOT to do with his team making the playoffs.
In games where Marcus Smart played 30 minutes or more, the Celtics were 17-11 (60.7%) which is the equivalent of the 4th spot in the East.
In games where Smart played less than 30 MPG the Celtics were 23 - 31 (42.6%) which is the equivalent of the 11th (or 5th last) seed in the east - just above the Hornets.
Some simple calculations can then tell you that we won the equivalent of 18 extra games (on a per 82 game basis) when we have had Smart playing 30+ minutes.
Honestly, I think it's pretty unheard of for a Rookie PG to have that type of impact on his team's success outside of superstar players like Kevin Durant, Lebron James, Tim Duncan, etc.
Now you can look at those stats and say it's a small sample size, or there are too many variables, and that's fair enough. But I think that no matter how you look at it, it's pretty hard to argue that Marcus Smart had a very significant contribution to this team making the playoffs,
If I'm voting for those spots, all of the above is far more important to me than an extra 0.6 rebounds per 36 minutes and an extra 0.2 assists per turnover.
But that's just me!