they are dumb asses, if +32 hit the calipers, +40 won't be any better as +40 will move the wheel inwards. Brake clearance is not dependent on offset but rather the design of the spokes whether they have high disk clearance...
Yes the original wheels have are +40 but the spokes were obviously made to clear the brakes...I hope they took this into consideration otherwise we'll definately hear about it