I don't like how they do the voting. Here are my top defenders by position:
C:
Dwight Howard - post defender/screen-and-roll defender/weak-side defender/defends rim
Kendrick Perkins - great post defender (specialist)
Joakim Noah - post defender/all screen plays/help(perimeter) defender/weak-side/defends rim decently/scraps for looseballs
Tyson Chandler - post defender/screen-and-roll defender/weak-side defender/defends rim decently
*hon. mention: Emeka Okafor, Tim Duncan, Andrew Bogut, Samuel Dalembert, Chuck Hayes, Marcus Camby
PF:
Kevin Garnett - best screen-and-roll defender in league/defends rim decently/great weak-side defender/help defender
Serge Ibaka - great all around shot blocker/defends all screen plays
Taj Gibson - defends post/defends rim/help(perimeter) defender)/very good all-around shot-blocker
Josh Smith - weak-side defender/help(perimeter) defender/defends rim decently/defends all screen plays in the lane/great all-around shot-blocker/great transition defender/in the passing lanes
SF:
Shane Battier - tight on-ball defender/denies ball with length/quick reacting/very good post defender/help defender/scraps for looseballs
LeBron James - best transition defender in league/quickness and speed to cut off penetration on-ball/weak-side defender/in the passing lanes
Luol Deng - tight on-ball defender/denies ball with length/speed to cut off-penetration on-ball/help defender
Gerald Wallace - transition defender/all-around shot-blocker/weak-side defender/help defender/decent post defender/in the passing lanes
Andre Iguodala - quick and fast on-ball defender to help cut off penetration/weak-side defender/decent perimeter post defender/in the passing lanes
Ron Artest - all-around post defender/transition defender/tenacious on-ball defender/quick reacting with length to cut off penetration/in the passing lanes
Trevor Ariza - length in passing lanes/quick on-ball defender
*hon. mention: Grant Hill
SG:
Thabo Sefolosha - speed and length to deny ball and penetration/quick reacting/weak-side defender/in passing lanes/tight on-ball defender
Tony Allen - tenacious on-ball defender/quick reacting/scraps for looseballs
Dwyane Wade - decent on-ball defender/in passing lanes/great weak-side defender
Ronnie Brewer - great transition defender/in passing lanes/quick reacting and fast on-ball defender
Kobe Bryant - tenacious on-ball defender/weak-side defender
PG:
Rajon Rondo - great transition defender/in the passing lanes/tenacious on-ball defender/cuts of penetration with quickness/scraps for looseballs/denies ball with length
Chris Paul - fast and quick reacting and tenacious on-ball defender/weak-side defender/in the passing lanes
Kirk Hinrich - tenacious and one of most quick and fast reacting on-ball defender in the league/scraps for looseballs
Mike Conley, Jr. - one of fastest on-ball defenders in the league/in the passing lanes
Jrue Holiday - tenacious on-ball defender/quick reacting and fast on-ball defender