I think your assumptions are somewhat unfair. Despite his bold and often fanciful predictions, he's a really smart guy with a history of impressive technological contributions. He's gotten a bad reputation in recent years for his outspoken certainty in the impending singularity (which, as seen in Transcendent Man, is somewhat tragically driven by the loss of his father and the hope of somehow reanimating his father's persona through technology), but he hasn't "lost it" or anything. I fully expected him to be critical of this test.