Use of terminology failed me again. At least the point got across.
As for reaction times, that varies from BOV model to model. Reasonably quick is the average, though, I can tell you that already.
I can't see a rational for going through the hassle of mounting the BOV on the IC. If it was effective and useful, someone would have done it before. Every auto manufacturer we can think of places the BOV/BPV on the upper charge pipe. But hey, if you want to donate your turbo to science we'll be here awaiting the results.