Brakes too good.

Just aquired an E39 to replace my E34.
One difference that is immediately apparent, is the lightness of the brakes.
So little pressure is required to brake, that unless I brace myself with my
left foot, I slide forward in the seat. This, for just normal slowing down
braking. Not hard braking.
Is this normal for an E39?
The brakes are fine orherwise. Quite progressive and smooth, with no
pulling.
I'm not worried about, but the handbrake doesn't seen too good either, but
that might be because it's an auto and hasn't been used enough to keep the
drums and linkage in good condition.
Mike.