The lighting makes it difficult to really see what state they are in, but they are getting there. I have a feeling it might be a little early, they look healthy from what I can see, I would have few qualms about waiting 5-7 days more and just keeping an eye on them.
Doesn't look ready yet....I grow this strain often! I usually harvest CK around 10 or 11 weeks....all rooms are different, but looks like you need more time on these! Sorry, but WELL WORTH THE WAIT! You still have a lot more leaf than bud....