Transfer to Skywards
 

Does have anybody experiences with a mileage transfer to Skywards, e.g. how long does it take?
Especially the transfer direction from American Express Membership Rewards to Starwood Preferred Guest to Skywards interests me. Is this direction really possible?
Might it be possible to transfer from person A to person B in this direction? Shall mean person A owns the American Express Membership Rewards account, but person B owns the two other accounts.