V-6 configuration has some benefits for twin-turbocharging, especially with the twin-scroll units. Even though the I-6 had better weight distribution and single balance shaft, just seems that BMW is committed to FI at this point. Would really be surprised if it wasn't a V-6, given the recent patent and the success of the N63/S63.
2014 335i RWD: ZMM, ZDA, ZDH, ZPP, ZTP, 2NH, 2TB, 5DL; Z4A MPPK; AW ext / VB int
2014 ML350: P01, R33, 297, 319, 846, 864, 889, 996; LB ext / AB int