I'm defo getting the lag issue as well, there is a SIB (service bulletin) for the US but i'm taking this or emailing it to the dealer this week to get it booked in, its bloody dangerous and if they refuse to update it, i'll ask for it in writing just in case i do have an accident down the line....
http://www.bmwtis.com/tsb/bulletins/...p/B280708g.htm