You still only have 1 fill for each 1100 from under the boat.
True, but if you are starting from empty, and are REALLY impatient, I'm guessing you could run both pumps to fill both bags at the same time, and then also switch on the x-over pump to suck out of port and into the starboard side. (or vice versa)

As long as you let the bag get a little headstart in filling before you start doing the transfer I bet it would work.

Fill the surf side twice as fast? Hmmm.