Well, he's responding to people who ask him questions and engage him in dialogue on this subject. If you think someone is a troll, stop feeding them. That's my philosophy, anyway.
You can't ask someone to clarify their position or elaborate on their problem and then if you don't like their answer, gripe about them banging on about the subject. That's not really fair.
And, frankly, it was an odd thing to say that the 5" and 7" would be different for highlighting a word. I was curious as to why that would be, too. Seeing as how I just bought a 950 and my Mom has a 350.