Earlier quoted context omitted.
I understand the point he is making, and I agree that the importance of advertising is declining. However, I wouldn't be able to explain Samsung's success without looking at advertising.
How about economy of scale in manufacturing, and (mostly) competent design and engineering teams?
Better economies of scale could be the reason if they decided to price their phones lower, but they don't. So that it's not the reason why people are choosing Samsung.
About the competent design, I don't see the Galaxy being superior to the HTC one or the Z2.