I really like Curry, but I think he'd have to be relatively healthy and play to his late 30s for a chance to pass Ray.
621 is incredibly impressive.
Also add in the fact that a lot of his shots are creating off the dribble, being a point guard and everything. His step back is one of the best in the league and it's difficult to double/overplay him because of his positional nature. I think next year, Curry is going to make that jump to get into the 1st tier of PGs with Chris Paul, Rondo, Westbrook, etc.