Quite true. I could for sure feel the difference from initial launch to top end run.
If they took your EBCS then from my guess they have set your High & Low boost settings via your Throttle Response modes (Intelligent, Sport,Sport #) - I have the same thing as I wanted to drive in low boost 90% of the time.
That's a really good outcome from a stock turbo and I'm only pushing close to 250kW in mine.
By chance are you rocking a 3" Turbo back exhaust?
That's a hella lot of $$ for doing 2 tunes.