UPDATE:
So this bird has only crowed once in the last two weeks...a bit odd I think. It's now 22 weeks old. I'd imagine a rooster would not stop crowing once it's learned how to do it so well. Also, it seems to be spending time in the nesting boxes.
And, according to the finger test that I've read about, its pelvic bones are almost three fingers wide now. I'm still not seeing any hackle feathers or saddle feathers--everything is nice and rounded in that department. Tail feathers are up, but that is the norm for this one it appears, as well as for a lot of EE's. And I guess that the bird is a mix of EE and bantee? It is smaller now than my 3-month-old girls (a SLW and a Black Australorp)! I am expecting small eggs (if it does lay).
So, either it's a weird pullet about to lay, or it is a weird rooster that doesn't like to crow. So I wait. The bird just seems to enjoy being coy.
It appears to be miffed when I took pictures of its rear end, but hey, I reserve that right.
Here are updated pics: