I don't want to get drawn into the numbers game, because you can imagine how inaccurate census processes would be in such a situation. It's really hard to guess on the numbers.
It is a mistake to equate the Pashtun people with the Taliban. Whereas the Taliban might well draw from the Pashtun people for support, and for recruits even, they are a very small subset, a minimal subset, of the Pashtun people.
I'm no historian, and I'm not a particular expert in this area, but my understanding is that the Pashtun people have been there for an awfully long time. Their traditions of moving across that territory cause the problems that exist for that border as it's currently situated. It doesn't necessarily mean that all the Pashtun people, whether there are 30 million or 40 million of them, are doing something that might be nefarious or harmful to our interests. It's the Taliban, the radicalized people who are looking to use violence to further their ends, that we're concerned about.
In fact, extremists are in quite a minority in Pakistan. We should remember and we should put a line under the fact that most Pakistanis are quite moderate people. We're not really dealing with a highly radicalized country in general. We're dealing with, as is so often the case, a very small minority of radicalized and violent people who are causing trouble for all the rest.