I played around some today. I felt no change in throttle response, but I did feel a slightly tighter steering. That could be from the firmed up suspension but there was a slight difference.
2015 M5, Alpine White/Full Black: Exec Pkg, Driver Asst, DCT, black 20s, More...
2014 X4 M40i, Long Beach Blue/Ivory-Black: Cold Weather, Technology, 20s w/PSS, Cameras, More...
Gone '13 X3 35i, '12 335is, '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i