Their combined cume and share has been greater than the sum of both sticks as independents before the simulcast.
That is a fact. There is no question of that. However, if the alternative format had been given time to develop, I think KHPT's numbers as "The Zone" would have increased to the point that its ratings and cume as a stand alone would have been higher than what both stations together in simulcast are pulling now. That, of course, is arguable as we will never know what The Zone's potential might have become.
Keep in mind, 106.9 was a stagnant 80's station that ran about 3 years past its prime. The frequency needed time for the average listener to realize that the same old Toto and Cars songs they played to death as The Point were no longer in the station's rotation. Cox didn't give The Zone anywhere near enough time to develop and find its place in the grand scheme of things, which is in my opinion is the shame of it all.