What
@NatJ said!
They mature pretty much the same as LF, maybe a little earlier but it's very breed specific (though I found the Barnevelders took ages). I treat my bantams the same as any other chicken. They just take up less space, lay bigger eggs for their body size, eat less and are more cute than large fowl!
It means I can have a rainbow flock of many different breeds and colours in the small space I have.
I raised some OEGB a couple years ago and loved them! So pretty, so friendly, and shaped like little rugby balls on stilts!