Boost is relative. You might push 22psi out of a 20g, and may only get 24psi out of a 35r, but the amount of air they flow is worlds apart. Actual psi doesn't really matter when comparing different turbos. n00b
I'm glad someone realizes this. everytime someone asks me about my car and hey know its is turboed... so how much boost you runnin... I don't even want to explain
Most of the time, depends on the application. Many many people run those and have 0 problems, some have major creep issues like Disco did. Roll the dice!