He made two major flaws in his argument. First, he said that both sides "steal" equally and then proceeded to differentiate the two cases. Secondly, he seems to be assuming that Apple "means" what they ship whereas he assumes that Samsung doesn't with no shred of evidence. While his points may make sense, there's nothing to support them. If I were to say the exact opposite, I'd be no more right or wrong than he is.
Nonetheless, he brings up some interesting ideas about how product evolution is contingent on people borrowing and adapting from others. Indeed, there's very little in mobile device development now that is truly unique.
(This wasn't a defence or critique of any company or product...I just hate bad argumentation. I do certainly think that Samsung takes more from Apple than the other way around).