I have to agree but this is a half-full/half-empty argument. My Veloflex-shod bikes, both clincher and sew-up, have light rims strung with 32 2.0/1.7/2.0mm swaged (a.k.a. double-butted) spokes. To the hand they feel similar, the clinchers ever so slightly heavier, and both lighter than the 25mm Paselas on most of my other bikes. I run all the Vf at about 140psi. With similar weight, sidewall suppleness, and pressure they should feel similar.

So what's to recommend one over the other? I think the sew-ups feel slightly smoother, but that could be the power of suggestion. A flatted sew-up is easier to change on the road, way less convenient to fix back home (but a good excuse for a beer). And you are screwed if you get more flats on any given trip than you are carrying spare sew-up tires, whereas a patch kit for clinchers covers a multitude of oops's.