Well I received the new unit yesterday, charged it up and once again timed the runtime. It lasted 38 minutes....

before heading back to the base to recharge

No better than my other unit. and yes, in regards to the last post, my floorplan is larger and it's takes neato multiple charges to finish it in one cleaning. It simply cannot last longer than 40 minutes in a single run...
So... now what? I noticed the first time I charged it on this new unit, it only took 15 minutes of charging time and then the light went a solid green. I still left it on the charger for 6+ hours just in case. Does Neato ship this unit with the batteries nearly full?
I'm going to test some more and time a few more runs and also time the charging time after a full depletion.