Well now you know of a bit more. ... So you've read articles about how babies merely exposed to television all day without getting one-to-one communication from parents don't do so well; and yet you still hypothesise that my brother's baby might have gained a higher level of language attainment than he has, based merely on listening to people talking on television, minus the one-to-one communication his parents give him?
No, I said he might have, or a lower one, or the same, but you have no way of knowing. And the results you cite might be general predictors, but they're not absolute!
And did I make any grand claims for that anecdote? Is it not possible to put a cute little anecdote for people to contemplate on here without being accused of trying to build a whole case on it?
Well, you kinda did present your nephew as evidence that talking a lot to babies aids development, yes. I'm merely pointing out that you don't actually know whether that's true, particularly without a benchmark. Everyone's kid or nephew is a genius