Maybe this will help. rward, who is a statistics junkie, pulled this together on another site back when a bunch of scenarios were on the table. The figures only look at the number of households from the top 210 markets, but it's close enough for our purposes :
From the list of 210 markets (TV sets/% of country):
Current Big 12:
18,223,300/15.868
Current PAC 10:
18,932,120/16.48
PAC 12 with Utah and Colorado:
21,825,300/18.998
PAC 16 with the south minus Baylor with CU:
30,968,320/26.961
PAC 10 with all the south:
29,019,200/25.265
I then added the following analysis (since I like to get my nerd on sometimes):
Current PAC 10: Each Pac member is tied to 1.89 million tv sets.
PAC 12 with Utah and Colorado: each member is tied to 1.82 million tv sets, a net loss of 70k households per member. But a small one that is more than offset with a championship game, additional games to put on television, more merchandising, etc.
PAC 16 with the south minus Baylor with CU: each member is tied to 1.94 million tv sets, which is only a net gain of 50k per member. But this is easily the best deal for everyone involved and the numbers get even bigger because of the number of network games available from a 16 team pool, national appeal of the matchups, more bowl tie-ins, and the possibility of adding 2 semi-final games to the conference football championship.
************
I should add that losing Texas A&M from the deal, which looks like a possibility, may actually increase the value of the PAC 16. We lose no TVs in the state of Texas but gain a bunch in Utah. Probably hurts merchandising and national audience a bit, but Aggie's also got an AD that's near bankrupt and their football program has done a hell of a lot less than Utah's in the past decade.
I hope this answers your question. Really, I don't know that you're going to see anything more than that. It's not like Larry Scott and his team are going to make public the metrics they have developed to calculate the value of each potential scenario in terms of expected media contracts and overall conference revenue.