On a 030/50 OS 3.9 is a bit slow (my old A1.2k has 030/40). On my A4kPPC with 060/50 it really flies...
Not exactly true. Surely it's not as quick as a stock 3.1 but with the right modification it can be BLAZING fast even on an ECS 030 system as you can see from an old video of my A600 running ClassicWB 3.9 bellow:
http://www.youtube.com/watch?v=CXp9c-BapXw
