Vehicle speeds... Hmm, this is such a controversial topic in BK Mod. But did anyone recently complain about any tank being too slow or too fast??!! As far as I am concerned; No! Therefore I believe that there is really no need to touch the speed of any vehicles. Speeds in BK Mod currently might not be absolutely accurate.. but rather "OK" at the end of the day.
I have to complain that jagdpantehr reverse speed is faster than sherman forward speed. But I think people have already told me that the max acceleration is the same backwards and forwards. So to answer your question. Yes people actually have started a disscussion about the speed of tanks.