you can get fairly aggressive in the tune to help with spool. lean and mean below 15psi. My ss green lights off pretty fast once it gets going.
a squishy tune and a big turbo really seem to compound each other in lag.

 

True...lean during early spool and timing approaching or at mbt. I've had two tunes on my current turbo and they almost felt like different turbos. One felt lazy to spool and came on boil somewhat slower than the other tune which seems to ramp up boost quicker and had better transient response. Engaging the next gear at wot was like getting hit in the chest, like a light switch went off and instantly back on.