Just curious what kind of motors this plane had? 35% N1 is pretty close to flight idle at lower speeds and altitudes on CFMs anyway, which wouldn't have anywhere near 35% if windmilling at speeds under 250, so maybe the engine was still producing at least a little bit of thrust. At least enough to keep it going with the generator and hydraulic loads, thankfully! I seriously doubt that whatever it may have been putting out did anything to extend their glide much beyond a pure engine out path.
All else being equal, would 70% N1 on one engine really keep this airplane level? I would have figured it'd need a little more juice than that.
I'm sure this scenario will be played out in A320 sims around the world, and maybe, just maybe, on the 20th try, knowing it was coming, doing everything dead on, one in ten of us may be able to make it to TEB, possibly even hitting a runway there. Notice I didn't say "land on". Not even a snowball's chance for EWR. These guys absolutely made the best choice, and made it under total duress.
edit: saw from the "1549 recap" thread (excellent read, BTW....) that the plane had CFMs on it. The geometry makes TEB look maybe a bit more likely than what I thought above, but they still absolutely made the best choice under the conditions.