I don't know if you guys have the same situation, but I have found that my Cemanis are really flighty and they are also just as fast...but thankfully also "chicken stupid" as usual...
out in the open, if they are paying attention to you, which they almost always are, you will never get closer than 10 feet from them.
I have to use two sticks, like the guy at the airport who parks jets.
It takes practice but by widely flanking them (walking around them) and waiving the sticks in each hand I can successfully "herd" them to where I want them to go about 90% of the time...
Also on a side note:
I have noticed that they can see in near darkness, unlike all my other chicken breeds...
All my other birds will be well and away up in the coop as the sun sets... but not my cemani...
They are still out in the closed run pecking and scratching away in the dark.
Clearly looking at me like "What's wrong with you? ignorant human...All chickens can see in the dark?"
They only go up into the coop an hour or so after total darkness falls.
I suppose both of these traits are because they are recently from the Jungle...
but that is just conjecture on my part.
Have you guys noticed this as well?
My two newest chicks are actually really friendly, although that could be because I handled them a bunch when they were newly hatched. They will actually fly up and perch on the edge of the brooder to say hello to me and hang out while I am doing brooder chores, and run over to my hand as soon as I put it in the brooder. Full of personality, those two. Might both be pullets, since I see no comb development or anything on either of them, but they are only five weeks old, so we shall see.
Also, I think you and I are chatting on another forum too