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. )
2008 E90 M3 - Dinan Stage 3 and BBS CH's
2000 328i sedan (UUC suspension - still the favorite)
2012 Mini Cooper (wife's)
1991 325iX (sold - gone but not forgotten!)
2011 X3 (Performance Center delivery done May '11)