Meh. The universal grammar concept has the potential to yield interesting insights, even if Chomsky’s version of it (or at least, Chomsky’s version of it which was current when I was in undergrad) resembles English too much in the particulars. Also, the “linguistic differences between ethnic groups” can of worms rarely contains anything useful, at least not when Westerners open it.

I will reserve judgment until I read more. Got any more?