Dunno what the main force of Bish pile-its are, but when I'm on they generally have the better quality guys flying. I find much better fights hunting in Bishland than vs Rooks. Of course the fact that nearly every Rook I find alone tends to turn and run screaming like a scared little girl after no more than 2 passes, until he finds 3 or 4 of his buddies to help him out, might have something to do with my opinion.
You can call it squad tactics or whatever else you want, I just think its kinda funny when I'm the only enemy con for 2 sectors and 5 or 6 of them have to pile in like they've gone months without a kill. If I did ever decide to hop countries, Bish would be the only ones I would consider helping.
Thats not to say there arent some really good sticks on the Rook side, there are. Some good guys too. Its just hard to find them for all the little pirahna-spits.