Nah thats not the problem. What is working on my nerves is, we have said countless times, if you want it power sooner ie boost sooner, then get -7's or -9's and they will yield 300 - 350kw!
If you dont car about lag and your car is not a daily and you want peak power then get -5's and once again, they will yield 400kw's.
I see no fine print in this, it looks very straight forward to me.