Agreed. A few, rather than many hours and its silly stuff like the impact of an extra 20-30 kts on nav skills that are the gotchas, along with the heavier weight for landing .... but maybe that is more significant with the taper wing Daks and Warriors, than with the slab wings.
I find that the Daks (and Arrow 4s) tend to 'sit down a little nose heavy', whereas the Warriors and Archers are more floaty and forgiving, whereas the slab wing Cherokees all needed a bit of a pull :-)
I went on to a PA32 at 74 hours TT and didn;t find it too hard either, but I needed 3-4 hours in the circuit to really get the handle on landing it consistenly - taking off was never a problem 2 up wtih 300HP!
A well sorted -161 must be a nice tourer. My bulk of PA28 hours (120 or so) are on the -181 which is a lovely aeroplane IMHO, I'd buy one tomorrow if I won the lottery, although it would be a II, as I'm not keen on the lowered roofline of the III, even though it has a nicer panel and overhead electric priming and start switches - give me the extra vis any time :-)