I'd follow the BMW recommendations on this. The manual is very specific as to break-in. I wouldn't rely on anyone else's opinion, because they're not going to be the one you ask to honor the warranty.
I've also been told by people high up in BMW that it's particularly important to warm up the S65 completely before getting on it. Follow the redline on the tach to know when it's ready to play. (This applies after the break-in period. Try not to exceed the recommended break-in RPM before the 1200 mile service. )
2014 X5 35d (Performance Center delivery May '14)
2015 M235i Cabrio
2000 328i sedan (UUC suspension - still the favorite)
SOLD! 2008 E90 M3 SOLD! 1991 325iX (both great)
2012 Mini Cooper - (wife's car)