None of that is evidence that Apple has made any kind of mistake. They just haven't how behaved how this guy wants them to.
What do you mean by "evidence"? You want scientific proof? A full expression in Lambda calculus? He's saying that it seems to him Apple would better serve themselves by not offering a 16GB model, and he explains why. Whether he's right or not is one question, but his claim is clear and his reasoning is simple. Your implication that there is any kind of contradiction here is asinine.