Tom, I only know one Oakmont member; he grew up next door, has always been a member, and says things like, "No problem, a lot of great pars made from there!"
I think you would be a really solid player if Oakmont was your home course. Otherwise you'd be a basket case! Why? Because if you miss a green, you almost always need a really deft little finesse shot just to have a makeable putt for par. The greens are that fast.
But the greens are so true and pure that you can make a bunch of putts if you start them on line with a smooth stroke.
One of the most embarrassing things you can do in golf is to hit a short downhill putt on the practice green on your way to the first tee, and watch it roll 10, 20, 30 feet past the practice cup, down the hill and into the middle of a group putting on #9. Never practice downhill putts on that practice green!