I have 3 EEs, and today, one of them their first egg at 24 weeks old. I got them when they were about one week old, as there was a mix-up with the people I ordered chicks with. They were the most skittish chicks, and as they got to be "teenagers", they were very hard to catch. I handled them daily when they were chicks and tried to have as much interaction, handling, feeding them treats, and getting them to be friendly to me. It didn't seem to be working, until they started "squatting" (they do this for roosters and when they're just about ready to start laying) for me about a week ago. Now, when I reach for them or they see me coming, they'll squat and I can pick them up, pet them, talk to them, etc. They are very pretty birds, and the first egg I got from them, albeit small, is a very pretty pale blue/green. I love their "muffs" and their tails are so pretty, as they're bigger and fuller than the Red Stars (Golden Comets, etc) and other pullets the same age.
And they do seem to have different "personalities". Truth, a white, buff and gray EE, is the wildest of them all, and while I didn't like the idea of a "white" chicken, she turned out to be very beautiful. She still needs some work on being handled, but I think she'll come around. She usually walks around with her tail feathers all "fluffed out" like she's proud of herself.
Love, who's mostly dark brown/black, with patterns similar to the "partridge" coloring and a beautiful golden/buff head, is very sweet and moves her head quickly from left to right whenever I go to pick her up. It's so funny! She used to be very skittish, but she's getting friendlier by the day.
Mercy, who's almost identical to Love, but darker, is the friendliest of the EEs, and will sometimes squat when she sees my coming her way. I had a nice long "talk" with her today, and asked her if she was the one who laid the first egg, as she was checking out the nesting box the past couple of days.
As far as size goes, since they're still pullets, they are about the same size of the Red Star pullets, but are narrower and more "leggy". They're not "hefty", more like the build of a leghorn, or polish. They've been that way since young chicks, and I don't know whether they'll fill out or stay that way.
Hope this helps.