some thoughts
It sounds a bit odd to me... probably because we don't have that today. A twin isle, stubby plane? Hmmm... I can see if it's long enough (a 739 or 757 takes a while to load/unload) but if it's relatively short, it may not save all that much time.
What irks me is that they keep designing seats with [at most] the same width and pitch as 30-40 years ago. People are both taller and fatter today, and of all the new features (the 787 promises bigger windows), how come more pax space is NEVER on the list? And that brings me back to the previous point - if people didn't have such a hard time squeezing in and out of their seats, maybe it wouldn't take so long to turn the plane around.