Not so sure about that........
Vulcans are stronger than humans and in the instances where Kirk provokes Spock to violence, Kirk realizes he will be greatly overmatched, recognizing the great danger Spock's strength poses for him. Spock is only half Vulcan so it is not unreasonable to assume that a full Vulcan would be stronger still. Kirk, and other human crew members of Enterprise(even Chekov) are capable of going toe to toe with Klingons. By extrapolation it should follow that Vulcans are also much stronger than Klingons.
It is true that Klingons are more savage and barbaric in nature, however Vulcans possess a history equally barbaric and savage, logic being their emotional savior.
Many times Spock has alluded to how dangerous Vulcan's can be, and how quickly and efficiently they can deliver a fatal blow, when it becomes logical to do so of course, which should at the least negate the advantage of the savagery of a Klingon adversary.