redtop91 wrote: The only one I know of is that if you aren't venting atmospherically, the recirculated charge on the cold side would be routed back into the unpressurized intake stream slightly lowering intake temp.
Not necessarily true. That would be true assuming that one has an intercooler efficient enough to cool the compressed air from the turbo more than ambient air temperature. The recirculated air would then enter the compressor side and be heated up once again. Temperature is arbitrary when discussing BOVs.
Putting the BOV closer to the throttle body allows for more response as the built up pressure due to the closed TB is evacuated quicker.