TM
I do not think that your give-away figures are at all representative but, from an operators perspective, the ability to get a large formation quickly though the tanker is paramount. Unless the fuel can be squirted out at high pressure/speed (KC135) then 2 hoses are advantageous. Otherwise, by the time numbers 5/6 has taken fuel, numbers 1/2 will need to top up again, having wasted excessive fuel loitering at high AUW and inefficiently low speed.
Hope this helps.