In this day and age there should not be any breaking in. If Ford truly believed that the clutches needed to be broken in it should have been done at the factory or at the very least the owner should have been made aware before taking delivery.
All that being said we are just shy of 1000 miles and I have not experienced any of this shuddering or almost stalling. Overall the transmission has been silky smooth and now that i have discovered the Sport mode it's a blast to drive by making the car overall more responsive.
I wonder what percentage of the Focuses with the DCT transmission are having issues.