That agrees with what I see in the females, possibly slightly larger, but I find my adult males average around 120g fully grown.
I have the same experience, they are omnivorous but given the choice they will ignore animal protein. Mine are fed almost exclusively on grains and vegetables, with a decent handful of seeds and nuts ... instead of adding dogfood to the dry mix, I give them parrot food. I also give them sprigs of millet at regular intervals - millet is without a doubt their favourite thing in the world ever.
If I didn't enjoy keeping mice so much I'd replace them all with multis - I find them much more productive and a better size...