Good point, so I test it to see how strong it actually is. If we have 6 villies harvesting from 1 sheep at a time, in the end you get:
710 food if you’re a generic civ
1042 food if you’re Tatar
Of course there is a bit of variability. For instance 710 time 1.5 is 1065 and not 1042.
However that’s only roughly a 2% difference with the calculated outcome, so I’m pretty confident with these numbers. Only difference is that it almost compensate for losing a boar rather than overcoming the loss, but it still sounds pretty good.