large breed crowing and eggs?

Hi, I have had sumatras for almost a year now. I know what to expect from the smaller breed.
I purchased some large breed "pullets" this spring.
1 buff orpington, 1 light brahma, 1 buff brahma and two black australorps. They're now 19 weeks old.
When can I expect eggs from these girls? I was told that large breeds take longer to get started. Will they lay this year?
Also, my light brahma has turned into a gigormous rooster. His feet are as big as my hands. He is beautiful! But he hasn't even attempted to crow. He's already larger than my adult black sumatra roo. How large do these roosters get? I handle him daily and he's fabulous.
Addicted,
Cindy

 

I only ended up with him by mistake. He is amazing! If I had him before the others... I'd only have brahmas. (please don't tell my others...)

He is larger than the year old sumatra, but still lets him push him around. I hold him daily as I take each off the roost and onto the fence outside. It's our routine. He makes all the other sounds that the other roo makes, so maybe eventually...he'll crow?? I can't wait. I look at him square in the face and try to bribe him to "sing" to me.
Yeah.. They think I'm crazy too.