I have real respect for your point of view, but I can't agree with you this time. I can't speak to the author's motives; they could be money, sensationalism, and who knows what else, but we can't, and shouldn't, discount that he may actually have been attempting to find out what life as a black man is really like.
Sure, black people can tell white people anything we want, and the white people will brush it off with a "what if?" or a bunch of equivocating about why it didn't really happen the way we said it happened. No, one has to be a "white" person living in a "black" body to understand that when there is no other answer to explain some situation, then racism must be considered to be the answer.
If what has been reported in past "experiments" such as this one are true, then the subject began to doubt him/herself and begin to develop a sense of inferiority from suffering daily indignities. They can be white to themselves, but when wearing that mask of darkness, it doesn't matter who they are "for real," it only matters what they look like.
Wht has been the real "result" of such undertakings? Generally, if white people are informed that they've been caught practicing racism, their shame isn't that they were racist in the first place but that they were racist to the wrong person. "If I had known he was white...!"