Both of my favorite road bikes are now converted to 650B and bigger softer tires and I love it. The superlight would only fit 32's but my Lemond BA now has 38's. There are a couple of spots on my 30 mile workout ride that have some pretty harsh expansion joints that usually jar me a bit. The BA with 38's make those feel buttery smooth. Very nice. I'm hooked.
DBG; I am running Panasonic Pasella tires on my daily rider/tourer - 700C x 43 rear and 700C x 35 front. I vary the pressure a bit depending on if I have the panniers on it and how heavy I am carrying. Very sweet ride...very close to or equal to other bikes I have with 650B's I have and without the limited supply issues, higher cost, etc.
/k