Guess I'll barge in on the hate-fest here, and mention that the lack of a second analog was by far the most complained-about fault with the psp hardware. I never actually owned one until just a few weeks ago but I remember whenever there was a revision announced that would be at the top of everyone's wishlists. It was also THE most welcomed change with the Vita when everybody first saw it.
The fact that an advert for dual stick controls could now be seen as targeting Nintendo with the 3ds has nothing to do with Sony, just Nintendo's own decision to not include one on their own new hardware.