Bruce, it really depends on what type of music you're recording for. An ortf for a classical music type piano sound will work great where for a pop song, it might include too much ambiance and muddy the mix. So a close micking maybe preferable.
Also why not thinking in player perspective, which has more attack sound (closer to the hammers) than the audience.
They're really lots of variables...
Check this article with its examples (it is a good read)
http://www.soundonsound.com/sos/jan08/articles/pianorecording_0108.htm
the sound files: http://www.soundonsound.com/sos/jan08/articles/pianorecordingaudio.htm