I was just going by your avatar image of that E60, so pardon me.No E60 here, kind sir! I have a 2003 E39 M5.
We have pretty clean fuel up here in the PNW as well, but 14 years is a long time for the filter to catch debris. I didn't cut the filter apart, but the hesitation completely went away after the filter change.
I know! the first thing I did was look it up... at least I know the bushings in there have around 50K miles, and are not what the factory put in originally. Might buy me some time when all is said and done, but really what it makes me do is cringe at what kind of accident this car was really in back in 2006.:eek7::eek List price for that bare subframe (well, it does include bushings) is nearly $2000!