OK then, fire in the hole....I know US News and World Reports rankings are not just an academic ranking. It is an overall ranking, and I am sure that you will disparage my findings by vilifying some aspect of their ranking criteria...however, they are objective. You and I are not.
Average ranking of Pac12 schools in the US News & World Report 2017 rankings: 81
Average ranking of ACC schools in the US News & World Report 2017 rankings: 55
Your statement that the Pac12 is only 2nd to the Ivy League is woefully incorrect. Take off the west coast sunglasses to see the truth.
Not enough? Money Magazine is another objective source: Average rank for a Pac12 institution, 147. Average for an ACC school, 143.
Lastly, my favorite college ranking site,
http://colleges.startclass.com/, has the following average rankings...
Pac12: 197
ACC: 91
If you want to compare conferences, you are walking in quick sand carrying an anvil.