Gotta disagree with this part, homey.
1. To begin with, it all depends on who's shootin. Korver's 54% (on threes) is better than guys like Gasol, Garnett, Bosh, Duncan, and Bogut shot "up close," ya know?
2. Percentagewise, the corner 3 may well be the best shot. It is the closest. It's only 22 feet from the corner, as opposed to 23' 9" from the top of the key.
3. Raw percentage, alone, can be misleading when it comes to the desirability, efficiency, and "effectiveness" of a 3 point shot. 40% shootin on 3's gets you just as many points as 60% on 2-point shots, with fewer possessions used, too.