It's not exactly covered convincingly though. The reason it supposedly can't transfer information is because you'd have to measure it, and we assume that measurement strictly follows Born's rules, which is a whole other can of worms. Sometimes people talk about density matrices instead, but we only use those since they are consistent with Born's rules. Additionally, many physicists point out that what you seem to be doing when you perform a measurement is entangling the system with the many bazillion degrees of freedom in the measurement apparatus and the world at large. We don't know, exactly, where the separation between a 'measurement-like' physical process occurs, or even if there really is one.
There isn't even a standard measure of entanglement for three or more particles. It's a pretty big mystery, still.
er, ok then i'll rephrase - "we're mostly sure it can't transfer.." or "we've never been able to get it to"
I doubt the writer meant it the same way you do. He was talking about the known things that hes not wrapped his mind around. In this case, explaining why the theories don't necessarily conflict should do.
There isn't even a standard measure of entanglement for three or more particles. It's a pretty big mystery, still.