I have all the respect in the world for the guys at Sterling. But I have *never* heard a mix that was "squashed" - even with "God-like" gear, that didn't sound worlds better UNsquashed. Never, not once, ever.
Mastering isn't about volume - although many would like to think it is. True, the final volume may be determined during mastering, and there's no doubt that I've crushed and continue to crush my fair share of records to keep the client happy.
But (A) Bone crushing volume shouldn't be the goal and (B) it is *always* damaging past the point where the mix naturally wants to sit. Once you compromise the sound of the mix in favor of sheer volume, you're destroying and degrading it, period. I don't care if it's Sterling, Digido, Euphonic, Gateway, Me... All other things being equal, no M.E. (or listener for that matter) I can think of actually prefers the audio quality of a crushed mix.
You can bet that whoever was behind the controls of those -8dBRMS projects (I've done several myself that came out quite good) would've rather put them out at -12dBRMS or even lower. But we have to compromise what WE think sounds "right" vs. what the client wants as far as volume is concerned all the time.