Yes true, in the sense of streamlining to reduce drag, but in the sense of shaving off (unneeded) weight and using lighter alloys in places, it would have an effect on engine to weight ratio, which would make a ship a bit more agile and also getting a better 'mile per gallon' ratio.
It's funny, I found the ultimte ship mod 5 minutes after that post.
I'll check out P&N too, thanks for the pointers...
Isk...