I've calibrated my 9C81 Penryn 15" matte display, with the Spyder 2 Express. The profiles are attached, using version 2.2 (which I believe uses the native whitepoint of the display) and 2.3 (which uses 6500K). I prefer the native one, but ymmv.
With the 2.2 native white balance, my LG 9c81 looks uniformly warmish in its whites - some might say yellowish. If I use the 6500k one, the lower part of the display is slightly yellow. I think that if people really try a profile with a neutral white (the 6500k versions), many will discover that their displays have the infamous lower 1/3 yellowing white issue. The native white 2.2 masks the problem....until you see another display with true whites and you realise that your MBP display is yellow all over!
Thanks for the effort!