I don't know about stopping distance but I am still amazed that there is almost no brake dust due to the ceramic brakes. My E93 wheels are dirty in 2-3 days with 50 miles driving while we can drive the X1 hundreds of miles and the wheels are still clean.
1995 325i,1996 328ci,1997 528i,1997 Z3 2.8,
2001 X5 3.0,2001 330i Conv,2002 M3 Conv,
2003 M3 Coupe,2004 M3 Coupe,2004 Z4 3.0,
2004 X3 3.0,2007 X3 3.0,2007 335i Conv.,
2013 X1 28 sdrive M Sport, 2014 M235 on order