It is very different from what I do! I find the reserves decrease too quickly in 2x speed, especially the 1 or 2 first days. Do you play in normal or hard difficulty? I have played 6 tribes in hard mode but now I prefer the normal mode, it's less "stressful"
My villagers usually have babies just before I quit the game. So I don't have to wait 400 mn (it's the time for nursing in ½ speed)!!