As said I think the 535d/530d is more lardy than what your used to with the 3 series and the 535d will weigh more too. Dont expect the 535d to go like a 335d either - in fact it will probably be more comparable to a 330d and the 530d slower still.
I drove a 535d a few years ago and I felt a bit underwhelmed and it didnt feel that much quicker than the Vectra V6 3.0 diesel I had a the time (which was 100 bhp less). Maybe I was expecting too much.
I know the ride on the 3 series LCI is massively improved against the pre-LCI so this could be the case also with the 5 series LCI but I've no idea - you'd have to ask on a 5 series forum for the differences.
Sorry for all the comparisons to the 3 series - but then this is a 3 series forum.