This thread has always come in very hand when I'm sexing my Silkies.
Last December I had a blue Silkie chick that I wasn't sure of and based on this thread, I "guessed" it was a hen.
Turns out I was right!
Great post!
I just hatched 10 Silkies and am looking forward to noticing the different traits.
I already have three adult Silkies and I have noticed the differences you posted.