Dave,
You talk about marketing hyperbole. Sikorsky claimed 5 years ago they would get the X2 to go 250 kts. Now they have gone 250 kts. Where is the hyperbole? On that article that riff_raff linked to, they talk about another 15 kts with some fairing. If they can actually squeak 265 kts out of the aircraft, then what you have is not hyperbole. Actually, it says they were holding back with what they thought it could really do.
-- IFMU