Me too, please keep posting, I missed the earlier stuff. What would Rossi be refering to? He would be the one guy I would nominate sitting in on the secret meetings. But I think he would only say in public the bike has a rev limiter, to protect the engine, not actually rev limited. To me in 2007 there was some sort of Japanese agreement to slow down. The early speed difference to Ducati was too much to be discounted without further question.
I could write a book of conjecture and theory on these questions.
Long story short, the pattern I'm looking for is horsepower limitation (I didn't create the pattern). Every major car racing series has them.
F1- displacement limit, bore limit, rev limit
LMP1/2 - displacement, air restriction
NASCAR - spec engine, air restriction
GT1/2/3 - air restriction, performance balancing (different rules for each car)
DTM - displacement, air restriction
IndyCar - spec engine, rev limit, boost limit (2012)
WTCC - capacity, rev limits
WRC - capacity, air restriction, boost restriction
In motorcycling, the FIM is much less transparent. We know Moto2 and Moto3 are horsepower capped with rev limits. BSB will be horsepower capped with rev limits (though they won't reveal the actual rev ceiling). Only God knows how many horsepower limits are in AMA now that DMG (NASCAR, basically) owns it. WSBK was horsepower capped with air-restrictors, but those rules were abandoned in 2004 and replaced with a rulebook that supposedly tolerates any power output. In reality, we have no idea what the FIM homologation papers say for SBK racing. Those papers supersede the rulebook. Interestingly, the WSBK rulebook does restrict the Ducati 1198R, the least powerful bike on the grid.
MotoGP is legitimately the last major racing series on the planet earth that doesn't have a horsepower restriction. Instead, MotoGp is fuel limited. If MotoGP was rev limited to 19,000rpm it wouldn't have affected the horsepower during the race b/c the 21L rule is more intrusive.
If the 19,000rpm rev limit was introduced via private contract before 2010 (before the strict engine life rules), it would only have stopped the manufacturers from wasting money on 21,000rpm-qualifying-grenades. See? A 19,000rpm rev limit isn't so insane, is it? The manufacturers probably would have wanted it, imo. Dorna probably would have wanted the rev limit, as well, b/c it cuts costs and improves safety. In 2011, the fuel efficiency advanced so rapidly that the 19,000rpm limit (if it exists) may come into play at some circuits, but it certainly didn't slow Honda/Stoner much. The sport is still fuel-limited for all intents and purposes. Rossi appeared to have said that the 19,000rpm rev limit is real. He rides MotoGP bikes, and he was employed by the manufacturer who allegedly proposed the rev limit. I'm inclined to believe him.
Motorcycle racing is not car racing, but the ICE physics are the same, and motorcycle engine builders studied the same material as the car engine builders. Many of engine builders construct both moto and car engines. Furthermore, sanctioning bodies have attempted to control horsepower since the first formulas were written. Displacement was once regarded as a horsepower cap of sorts, but the sanctioning bodies had no idea how high the engines could actually rev (or how much it would cost). Bore/stroke limits, air-restriction, and rev limits are all effective for regulating horsepower and reducing the rev ceiling. Lower rev-ceiling = lower cost (or so the theory goes).
Regarding the Duc in 2008, don't look at the revs, look at the tires. MotoGP had several rounds of emergency tire meetings. Michelin and Bridgestone come from F1 where they had a controlled-tire war. Imo, the wrote some rules to keep the tire war going without getting someone killed. I think the rules may only have governed the front tire which controls corner entry. Rossi/Burgess out-developed Stoner/Preziosi in 2008 and beyond. Bridgestone out developed Michelin. When Michelin left, Bridgestone was control supplier. When Stoner left, Ducati hired Rossi/Burgess to help them do what they haven't been able to do since 2008--engineer a bike to work with the tires. Yikes.
Not sure if you heard, but Dorna hired the former director of Bridgestone racing as a consultant. I'm optimistic Dorna are working on a set of rules to bring the tire war back. Imo, the first set of rules (2008) failed b/c Bridgestone developed the front tire with squishy edges. If the front tires were profile-controlled (like the WSBK tire war rules), a tire with a squishy edge would have made it impossible to regulate the size of the contact patch. Michelin bailed b/c they didn't want to bring F1 optimum-contact-patch technology to GP. They probably didn't have stuff as good as Bstone, either.