What constitutes a smooth jumper? Outside of his rookie year where he shot well, he really hasn't shot the ball well the last two years (at least that's how I remember it). Can you have a smooth jumper even if you can't knock down shots? I'm not being funny or anything. This is a serious question.
He shot the ball well his second year in Boston. A .472 eFG% on jumpers is pretty good; Kobe's eFG% on jumpers was .467 that same year, and Lebron's was .394. Gerald also shot .462 eFG% on jumpers in his rookie season, which is very respectable.
Now, last season Gerald fell off a cliff with his shooting, but that's partly due to an inconsistent role. Upon until that time, his shooting had been a plus.