I find that unlikely. The rush is more likely to screw with your muscle memory and the balance of your whole system. Those physical responses are made to let you run and fight, not put a fine feathered touch on a basketball. They make delicate work much more difficult, not easy. As a matter of fact, I propose that clutch players do not feel the pressure at all and remain as they do in non-clutch time. By that factor, I also propose that a choker experiences the chemical rush and ends up failing because of that.
Just look at clutch players. They are cool and collected, like the situation isn't any different than normal. It is like public speaking. You are either comfortable like nothing is wrong (clutch) or you get nervous, sweating, and feel a rush (choke).
I propose that Gary Neal is an anomaly or he is just really good at collecting himself and getting back to normal in big situations. Sometimes you gotta stop thinking so much and he seems good at it.