There is no comparison between the folded dimensions of the 1/2way and a Downtube or Dahon. The single sided stays and fork make for a folded width that has to be seen to be believed. My 1/2way with rack, fenders and bag is lighter than my Downtube with none of those things. Thats right I own both. I have no intentions of selling my 1/2way even though I also have the full suspension 9sp Downtube. Both bikes stop traffic but the 1/2way does because it is way cuter and sexier than the DT which is unusual and/or interesting to look at. I have ridden the hell out of my 1/2way for two years with nada a mechanical problem, nada! The DT is currently down because the shift cable suddenly parted ways with the shifter after about four months of fairly frequent use. It's too close to call for me.
H