I'll admit that I haven't read the 70 pages on the PRC, but it's not as cut and dry as you are saying it. I've been around 2 of them, and that's not much, but those 2 were not superior. They were nice rifles for sure- and they were accurate, but they should have been because they had good components and were built correctly.
Also, most of the time when someone says that they re barreled their WM to a PRC and saw big improvements they are comparing the factory 300wm barrel to a aftermarket PRC barrel. That's not fair- I'm comparing a custom 300wm to custom PRC. We were very surprised by the results when we were shooting them because we were expecting the PRC to be faster, And when we started hitting pressure signs it just wasn't. Chalk it up to whatever- it could be the barrel or the fact that we had better brass than Hornady for the WM.
A few days later my friend sent me a link from Mark and Sam on youtube.... and they found the same thing when they compared them. That's still not much of a sample size- but enough to make me skeptical of the "superior in every way" claims.