Pseudo Nim, people seem to complain that BMW's management of the AWD system is moderating slip excursions too aggressively. People want to be able to use the throttle to get the car to turn, like they can with RWD.
BMW seems to think a slight understeer/near neutral attitude is ideal, and is pretty strongly enforcing it on the chassis with the AWD.
Of course, everything that makes an oversteery awd system fun in the dry makes it harder to manage in the wet/slippery stuff. Most car companies are looking to simplify the operation of the cars, especially four wheel drive, because many users either do not want to or can not handle the complication of making these drivetrain decisions.
It seems that most people don't want to deal with a tarmac/gravel/snow button, a la the evo, and they probably want less scrutable systems like the subaru DCCD with Auto/+/- and the 6 levels of manual lockup even less.
So, as with many other aspects of the car, it's up to the enthusiast to fend for him/herself.
