Taking into account the degree of difficulty of many of Duhon's shots -- I'd wager that almost half of them were from no closer than 22 feet and many originating from transition pull-up situations where he would stop and pop on a dime from the invisible volleyball line -- his roughly 36% shooting from three-point land as a freshman and sophomore was in my view actually pretty good. Not Seth Curry good -- then again Seth doesn't have as much range as Duhon and doesn't shoot from as far out -- but 36% isn't dismal, not when considering the kind of chances Duhon often took. And that extended range made him extraordinarily tough to guard, forcing the opposing team to really overextend its defense and opening up the inside for penetration.
By the time he was a junior, I completely agree, Duhon's shot had become so erratic that it was pretty much unrecognizable. I'm not exactly sure what transpired over that period of time that caused such a dangerous outside shooter once upon a time to experience such a spontaneous, dramatic drop-off in quality -- I mean, 19% shooting from beyond the arc is entering Shaquille O'Neal territory -- but I liken it to a pitcher in baseball who has suddenly lost all control of his throwing faculties and begun to spiral deep into a black hole of ineptitude, and can find no way out. A phenomenon they call in the Major Leagues as being possessed by "The Creature." It led to the end of Rick Ankiel's career as a left-hander. It's really a fascinating case, what happened to Duhon. He just seemingly fell into a slump that he could never psychologically dig his way back out of.