I can feel your frustration. My RIR, BR, and wellie are all 29-30 weeks and don't even show ANY signs of comb or wattle development yet. The BR sings the egg song all day, every day, has for about 10 days now, but no squatting and no other signs of maturity (as I said, not even comb and wattles yet). My leghorn was 22+ weeks before she laid, as well (they usually start earlier, closer to 18 weeks). Our EE was right at 29 weeks when she laid her first egg & right now, she's our only one laying (the leghorn died). We acquired another young EE pullet last week who was hatched out March 1st and started laying a month ago (lady I got her from was thinning her flock & this poor girl had been loved fairly aggressively by their rooster & is missing a lot of tail feathers). However, she's only been here a few days & hasn't laid for us yet, but the lady I got her from said she lays a pretty, light-green egg (so now we have 2 EE's that lay the pretty light-green eggs).
I am getting tired of waiting for the rest of the flock to start laying. We have a coop light now in hopes that will help, but I am worried that the flock isn't even developing combs or wattles at 7 months of age! They hatched in April & this is already November!
I think the people we got our original flock from must have not fed them right or something. I can't imagine why it's taking so long, except for the climate change, maybe? I have a friend who has a BR & EE a couple of weeks older than mine--her BR has had a comb and wattles for 2 months and hasn't started laying yet!
It doesn't make it any easier, either, that we were new to chickens and lied to about the ages of our birds by the scheister who sold them to us (he is now out of business). When we got them in May, were told they were 3 and 4 months old and that they'd be laying eggs by July/August! I've since learned what chickens look like at different stages/ages, and our birds were, in actuality, about 6-8 weeks when we got them. They were fully feathered, good sized pullets and were living outside amongst a large flock and had long since outgrown any chick down (though I think the wellie may have had a tiny bit...she was obviously a little younger than the rest by a week or two and has been sick almost constantly since the beginning and hasn't grown much).
ALL my girls should be laying by now, but only 1 is (she's been laying about 3-1/2 weeks now). This has been one expensive egg project, lemme tell ya! Good thing we love the chooks cuz if we were doing this solely for the eggs, we'd be about 3 kinds of PO'd right now.