Really fun reading this. I don't know enough to give any extra comments. But using my logic and all the engineering classes I've taken so far, I'd say Rara is right on this. Now you said see what happens on the boost guage when you rev up right? I'll tell you what happens, it depends on how heavy your foot get on the gas pedal. If you're in full throttle, it'll jump up to almost full boost right the way. If not, it'll not get to full boost anywhere. It's almost the same all through the rpm range as long as your foot is holding the throttle at the same position. I do it with customer's turbo'ed cars all the time, try it you'll see too.
