I don't know if this has been posted but I figured I'd share in case if it hasn't.
Early on in the game, citizen soldiers have some decent gathering stats -- they excel in wood, stone and metal gathering but lack in food. However, as they see combat, their stats get progressively worse (and even as low as rank 1, you'll see dramatic changes).
This is what I managed to record:
(Persian Empire, this is INCLUDING all upgrades of collection rates!!!)
BASE SOLDIER/WORKER (fresh spawn) : Food 0.7 -- Wood 1.5 -- Stone 1.0 -- Metal 1.0
Rank 1 (Advanced Rank) Food 0.4 -- Wood 0.7 -- Stone 0.5 -- Metal 0.5
Rank 2 (Elite rank, highest possible) Food 0.2 -- Wood 0.4 -- Stone 0.2 -- Metal 0.2
Women have: Food 1.1 -- Wood 1.4 -- Stone 0.7 -- Metal 0.7
This makes women ALWAYS better at food than men, really close to wood and generally worse at stone/metal until the men see combat. So keep an eye out for your elite soldiers, they shouldn't be plowing the fields!
Also, their damage is increased slightly as well but I haven't yet recorded those stats (game was disconnected before I could write it down; I intend to try either tonight or tomorrow)