Glad you found my thread interesting. :-) It was just one day of side-by-side observations so it's not "definitive", just what I experienced that day. fyi, I am also 200 pounds at run my Schwalbe Marathons at 35psi and haven't gotten a single flat since I got them. I think 35psi is the lowest rating on the tire as well. I know a lot of people regularly run their Nokians at much lower pressures all winter to and don't get flats - dunno why exactly, maybe it's the 35c part, maybe winter roads are somehow better for flats, who knows.
If you won't go to 35psi though, I think you're avoiding a tire pressure the tires were designed to optimally run at though.