Kurtz,
As stated in my previous post the Captain
does not take control in such an emergency. If you were do so you would be wrong.
The SFO is often a better handling pilot than the Captain as that is all he does. The Captain has to have overall responsibility for the aircraft and it would be his job to manage the emergency. You don't do that by taking control with the resultant tunnel vision you would have of the situation.
Look at the BMI accident at Kegworth where the Captain had control
and disconnected the autpilot. He lost the ability to manage the emergency properly. It's a standard example at all CRM courses.