No one is slagging your dyno result. What they are saying is read the sticky thread at the top of this page called Rb25 Turbo Upgrade, All Dyno Results that reports what other people have done so you can see what is required to make your target power.
e.g. you don't need a ff plenum but if you really want one just use your stock throttle body. You don't need a new head gasket ot fuel pressure regulator or exhaust manifold or cams.