Based on my first look on the tool Driving has little effect on anything. On the other hand I've seen some top managers rate driving quite high. So whats the verdict? Driving yey or ney?
yes, this has been asserted many times, although I'm not sure there is a really authoritative statement from a BB about it.
Which version of OO is needed?
If I read it correctly, the rules there confirm what Juicepats said, but don't mention that other claim that repeating a training several times will make it slower regardless of all other factors. I hope I got this right now.