Ok, so can I revise my conclusions as follows?

1) The lauter efficiency of a perfect fly sparge will always be equal to or greater than a perfect batch sparge for a perfectly designed lauter tun (such as Figure A.)

2) The lauter efficiency of a perfect fly sparge will be negatively impacted by a sub-optimal lauter tun design (such as Figure D) such that batch sparging may provide higher lauter efficiency.

On the subject of stirring, would stirring during lautering nulify the negative effects of a sub-optimal lauter tun design when fly sparging such that lauter efficiency of fly sparging again exceeds that of batch sparging?

Brian