This is why i am more for a small difference.
They shouldn't get you in a few seconds, but you should be aware that if you take too much time to leave the area of find a good hiding spot, they will get you in the end.
On the other hand, it would be nice if all npc would have their speed & efficiency nerfed in case of lags. They become too much OP when you need 10 seconds to see the result of your actions.