Have you just looked at the outside of your ecu or have you pulled the cover off it?
Also lets not forget that there are some "happy" dyno's around, if the one you were on is a happy dyno it could be reading 10-20kw higher than it should, where did you get it done?
If you have a look in the rb25 upgrade thread you will find people with your same set up doing similar sorts of power so its far from out of the question, as i have found tho the limit of the standard injectors (if they are standard), fuel pump and afm is around 200rwkw, im doing 210rwkw with the injectors seeing 100% and the afm tuned to 110% so if you go a hi flow you will need to upgrade all of these and your ecu, plus a fmic if you are still running the standard one.