Here are the numbers that are doing the rounds at the moment:
56% of all crew on COS08. Total crew is 2490, so 56% of that is 1395. Assuming that all Captains (937 of them) moved over, that leaves another 458. Of that number, apparently about 300 were already on COS08, so that means that only about 158 (of the available 1252) signed up.
As far as I can tell, that doesn't look like a great victory for CX...