Here are two true accounts that I heard first-hand, regarding Discovery's "animal proof" of the Torah's divine origins.
The first is with a neighbor of mine. She was very distressed to hear that the animal proof doesn't actually work. Nevertheless, she told me that she was glad that Discovery used it with her. She told me that although she had many reasons for wanting to become Orthodox, at the time she needed to justify it to herself as being scientifically legitimate, and the animal proof served that purpose. Now that she is happily Orthodox, it doesn't shake her that the proof doesn't work, and she's glad that she had it when she needed it.
Another story is with someone that I met a few years back in the US. He had become Orthodox via a different organization than Discovery, but one that also used the animal proof. When he discovered (independently of my book) that there were serious problems with this argument, and was given the usual run-around by the outreach workers who had "converted him," he was fundamentally shaken to his core and felt that the Rabbis had tricked him into becoming Orthodox. He lost his trust in the Orthodox enterprise, and began drifting away from observance; but he had already gotten married to an Orthodox girl, which caused some problems, as can be imagined.
I happen to know more stories like the latter, and I know of no others like the former, but I don't think that that is so relevant. Nevertheless, I personally don't think that the former justifies what happened with the latter. Still, it's something to ruminate upon.