[crummy]

Something strange: I revisited my results an hour later and the order seems to be different. In some cases, a friend has gone from rank ~20 to 10.

My only guess is that people are adding/removing friends which changes things around, but that seems to be quite a difference.

Edit: For what it's worth, the listing seems very accurate for the top 10, which is comprised of my best friends, my sister, a couple old girlfriends. Things get a little weaker after that.

[bmh100]

Rankings can seem to be unstable if the absolute differences between the scores are very small relative to the likely ways those scores could change.

Example:

Rank,Score

1,0.81

2,0.541

3,0.540

..

40,0.538

Increasing the value of row 40 by just 1% will cause it to go from rank 40 to rank 2.

Edit: Improved formatting.