Diplomatic immunity also gives a warp speed boost. With 9/9 driver coils and diplomatic immunity, slipstream is 34.89
You seem to know things, and I've had a question that's been bugging me. When you hit T3 diplomacy, do you get the speed bonus of DI as a passive thing? Or is it only something you can give out? I -seem- a little faster, but that might just be the placebo effect.