Well Klingons have a history of being curb stomped by Augments like Khan. The Augment trilogy in ENT fourth season "Borderland", "Cold Station 12" and "The Augments". Not that the general audience would be privy to such information but it might have been useful to have a line in the film detail the strength levels of the races.
I think these are strength levels of the races. I'm not to sure about Klingons but 2 sounds about right.
If Humans are at 1
Human - 1
Klingon - 2x the strength of an adult human
Vulcan - 3x of humans
Augment - 5x the strength of humans
Just for reference
Orangutans and Gorilla have 6x the strength of an adult human