as was just said it depends what you call AI, I class it as something that can truly learn and adapt, but consumer robots these days have more a simulated or virtual intelligence, it's more rigid because they can't expand on their programming (adding newly learnt things for example) they simply cycle through their programming, based on input and stimulus.
This is no less impressive though, the fact you have a responsive "living" machine is amazing! 'True' AI is a ways off yet, but what we have is still interesting, Pleos will have variable personalities though because they do still take in information to alter which route of programming they take.
This probably isn't very well explained, but basically Pleo does have an AI, it's autonomous, and was programmed to be pet-like.
even AIBOs, though more heavily programmed than pleo are still limited! But of course I still find it all fascinating it's a great growth in robotics and technology to even see these simpler AIs available. Especially if you were growing up where nothing like this existed! the most exciting 'robot' I had as a kid was an original Furby! hahah