Could well be true! I'm not qualified to speak about that. Looking it up, seems like I mis-spoke when I said Urdu was Dravidian. But there are a lot of Indian languages that are (e.g. Kannada), so the overall point stands that the "averaging" comment is a bit misleading.

Incidentally, your comment led me to this http://en.wikipedia.org/wiki/Hindi–Urdu_controversy which you may find interesting.