Walking up the left side of the first hole on Wednesday – outside the ropes, of course! – I looked back at the ninth green from the top of the hill. Take away almost 80 years of tree growth and plantings, and it's possible to make the case that you could try to play a second shot to the original ninth green from the first fairway. But the falloff to the front and right of the green from that angle would make a mis-hit shot bound down the hill forever and ever. I'd think there would be more risk than reward.
Logically, the only ones contemplating this would have been those in contention in the final round of 1934, the only year the course's nines were reversed for the competition. Contemporary reports on Horton Smith's win (which I have studied in depth for another project) don't indicate than anyone in contention did so. That's not to say nobody did, whether in contention or not, only that it wasn't noted.
Playing a shot to the ninth green from the slope of the hill would bring about a downhill lie to a green on a downhill sidehill slope, a real recipe for disaster. (Love the video game views Matthew posted, but like most shots of Augusta, they fail to display the elevation changes that enliven so many shots there.)
Conversely, a mis-hit shot from the ninth fairway, whether from the flattened landing area Mr. M writes of or not, would be less penal, since the shot would be running against the lay or the land rather than with it. I'd play down No. 9, myself.
That's based on my firsthand observations, and all I have to say on the topic. Carry on, all.