The interia of air does indeed have a real effect. its very influencing on the operating characterisitics of a motor. Enthalpy summed it all up: keep the inertia of that column of air moving towards the TB and simply divert it out the BOV when the plate snaps shut... taht way when you get back on the throttle and it opens... the bov shuts and the air is already rushing into the intake.

If you look at intake manifolds, they have a method to the madness. Longer runners are for better low end breathing and torque... shorter runners are for better top end breathing and top end power/torque... the reason this happens is called "intertial supercharging". Ethalpy knows what im talkin about, im sure... it would take quite a long post to explain it and the physics behind it... but, just remember that the inertia of the air is a big factor sometimes.

No, you dont wanna put a bov at the turbo and at the TB... cuz when they both open, the air stuck between the two Bov's dies and lays stagnant and has to be reaccelerated again when the TB opens.

i hope that helps..