No probs mate.
I asked, a long time ago, an extremely well thought of workshop about highflows and was told that I would never get over 220rwkw. Well I made 228rwkw on 13psi through the auto my car used to have.
The sad fact is that it is extremely rare for a workshop to be totally honest with everybody. There might not actually be one in existence. On the other side of the coin, people on here are sometimes prone to exaggeration and shit talking. Unfortunately, each person has to take it all in and decide what to make of it themselves. Hey, it's part of the fun and the challenge of modifying a car.