If you are referring to my posts, unfortunately scotty's dyno chart pic didn't come with the relevant quote but it is worth going back and having a look at how much more average power the stocker made under 6000rpm. Assuming the turbo has reasonable lifespan and doesn't shit itself that looks a pretty outstanding result for everyday use.
As usual a dyno doesn't really tell you how it will feel on the road as there are other variables. The RB25 powered stageas (manuals) are a much better drive with 400-450 hp turbos compared to going up to 500-550hp turbos due to their weight for day to day driving IMO. An R33 lugging less weight around isn't hampered anywhere near as much.
Autos change the game, if you make enough power who cares if you lose a bit to the converter.