Oh, the concept of the test is fair, but the order of phones is not randomized, and the sample of testers is... 2 I mean, on the second test, the guy spend 10-20 seconds looking for his number in the contacts, but it's not there.. how relevant is that? Steps involved in the three tests seems to be very much the same on both UI, but it looks like WP7 vkb is faster, and people cannot unlock the N9 easily. Apart from that, there's nothing relevant in the video.