Like Djo says, I guess in the end keeping New Boost Techniques is the best option. It's what everyone is used to (and all our references point to it, for example the explanations on the Non-NBT site, etc.).
The fact it's no longer 'new' is no biggie. The term new is always relative to something. Compared to the basic (ancient
) way of driving, these techniques are always going to be new.