Mark/Jason,
Boy, do I feel stupid! You are right, those are much larger than I would have bet without seeing the photo in front of me. I can't ever remember having a putt longer than about 65 feet on either green so I figured them as about 80-85 feet in diameter. And there is clearly a lot more rough around those greens than I see in my mind's eye when I think about those greens, but photos don't lie! The only change since those photos were taken would be the removal of the bridge between the greens and the addition of a cartpath running along the back of both greens.
It is hard to measure (wish I could zoom) but I'd have to say the greens themselves are probably not too far from the size of TPC #17, plus the rough that easily makes them much larger. Obviously "what's the longest putt I can remember having" isn't a green sizing method I'll be using in the future
BTW, if anyone is curious, the tees are just left of the little sherpard's crook in the cartpath (the deadend, not the loop -- look a bit above and left of the SOUTH on the bottom of the aerial) The alternate tee (which isn't very elevated and only ever plays to the left green these days) is reached by following the shepard's crook path left and up to where it meets the other two paths, and is just left of that point.
When I was saw that photo I was wondering when the hell it was taken, because the course looks so barren and treeless! I know they've added at least 1000 trees since 1990, but still. Then I saw it was taken in March, when all but the evergreens and pines were leafless!