Chris, calling number 18 a par 4 instead of a par 5 has nothing to do with rough, or width of fairways. It is an accounting device, that helps keep track of scoring. When the USGA does course ratings, to determine how hard a course is, it does not consider that accounting device. It tries to estimate what actual scores will be, not what par says.
Through two rounds, Oakland Hills and Torrey Pines got almost the exact same % of birdies, pars, eagles, bogeys and doubles. Without the accounting device, which has little or nothing to do with course setup (and in any case is only one hole), the tiny difference would favor OH.
It might anyway, after the 3rd round ends. We already have a 65 (Romero, who made 7 birdies). May be in line for at least one 66, several 67's, and a number of other scores in the 60's. And the round is only half way through.
My main question was, why do so many pan OH and praise TP, when the number of birdies, pars, eagles, and bogeys are so similar? My sense is that it's a reflection of the basic architecture: the setups made OH worse, but TP better, even though scoring is so close. Tiger may have had something to do with it, too, along with expectations.