Wow this argument is silly.
Come on guys, really, its been shown already that a 30 will rev, they dont drop off in the top rpm, they just don't feel like a slingshot like the 2.6 as the power is a smoother delivery (eg pulls from down low).
Agreed with BB though shame most people are not spending the time, effort and money on 30's and are happy with a basic effort build (funny though, the comments even someone with a basic effort build will say over their old engines but im not getting into that).
RIPS has done stacks of development and good on him for pushing forward with it. Whats his rail car down to? Surely thats got to be close to, if not THE the quickest RB on the planet.
While im at it; As far as comparisons go, you wont find a closer set of GTR's spec wise than Pauls and mine (in my old setup), I wont even say what I think of the difference, his posts are enough that anyone can see the result