I have had some kind of ignore me then at 2-3 weeks go really friendly, leaning on your hands, coming running. Some are like that much earlier too. I have had 2 flighty ones and they were brooded elsewhere and came back to us as we had a bad incubator and got zero chicks due to temp spikes etc (Brower top hatch!) I'd never had any go though that phase though I know the ones you are taking about where at 2-4 weeks they have the freakout stage! My hubby calls them Klingons though I have a wheaten Ameraucana too who could cling for her country! The EOs love to be held and they seem to be attracted to humans from the start. Some of them are more fidgety than others, and will peck fluff off you etc but I have some that I have fed worms to when gardening from a few weeks old, that will sit as long as you have them there. My roosters seem less fidgety and hunker down for a cuddle any time you let them up on your knee.
Rate of lay is "Pretty good" for a heritage breed the standards say255 a year and on average we seem to get 3-4 eggs a day for four 1- year-ld and one 3-year-old hens. In Jan-Feb we had a couple of weeks of 1-2 eggs per day from 5 then we moved their light closer (they were downstairs in a dim bank barn) and they went back up to 3-4 with days of 5 for 5 hens (same thing happened with our lavender ameraucanas!). Since it warmed up here were are getting more 5/5 days! Nice to get 2 dozen hatching eggs a week from 5 hens! The eggs are big and XL, only larger ones here are my lav orpingtons eggs. Black penedesencas almost lay same size and frequency as these but the EO eggs are fatter/rounder and shiny. The only breed that lays better here in winter are the chanteclers and the orpingtons are close too as long as you don't move them (they stop for a month then!!) I would try these if you get the chance.