Everyone playing at the tour level is at least a good putter, and my guess is that the difference between a great putter, like a Faxon, and a "poor" putter, like Singh, Garcia, Cabrera, etc., is simply consistency. The latter will have weeks where they putt as well as anyone, within really minor statistical variations - Cabrera had one of those weeks - but the former does it week in and week out.
Saying he made more 12 footers at Oakmont is no small feat, indeed. Did anyone happen to note the breaks on those shortish putts? When you do it for 72 holes, it's not a fluke or luck, as his modest remarks imply. I'd have to check the stats and whatever, but I remember him making at least a few putts that were substantially longer than anything I saw Tiger make, and he only needed to make one of 'em to provide the difference.
Jim -
I don't think the slope numbers are computed under Open conditions. As I related earlier, I have a friend who's a single digit golfer and who worked the grounds crew at Oakmont in 94; he told me he played the course a day or two after the 94 Open and didn't break 100.
I'd love to talk to any members who played the course this past week.