I expect there will be no crane on the core itself.
There is already a concrete pumping arm at it's centre (the red structure).
Then: both present cranes will go to the top.
Core jump frequency is 4 days for the lower part (6 floors?), and 3 days for the rest.
Don't know when that sequence actually starts. After this first jump, some finetuning may be necessary on parts of the system.
And the outer columns do not seem as far ready for the tempo yet.
Topping out is not before the end of 2013.
PS
I hope the webcams will be adjusted regularly from now on.
Otherwise we will loose the core out of sight...