Just as food for thought here are the January (2004) statistics.
Rook Kills Vs. All:262,736
Rook Deaths Vs. All:238,547
Rook Kills/Death:1.10
Bishop Kills Vs. All:216,717
Bishop Deaths Vs. All:246,801
Bishop Kills/Death:0.87
Knight Kills Vs. All:239,960
Knight Deaths Vs. All:234,067
Knight Kills/Death:1.02
Rook K/D Vs. Bishop:1.13
Rook K/D Vs. Knight:1.06
Bishop K/D Vs. Rook: 0.87
Bishop K/D Vs. Knight:0.87
Knight K/D Vs. Rook: 0.93
Knight K/D Vs. Bishop:1.13
* As you can see the January statistics are very consistant with the entire 2003 year-end statistics. Actually, Bishop K/D is exactly the same as their 2003 total K/D. Similarily, Knights salvaged a reasonable margin on Bishops by being far more effective Vs. Bishops than Vs. Rooks. While Bishops may totally lack relative effectiveness they do get points for being consistant, consistantly bad but, consistant nonetheless

Zazen