Really? In my game enemies dont take that long to take their turns at all, but the game does ocassionaly freeze for a second or two.
But holy cow this fight is nuts. The number of gobbos are fine. Their goblins after all.
But the number that are spell casters, the number that throw bombs. Etc etc all adds up. They do to much damage and soak up to much damage. Even when getting the jump on them its IMPOSSIBLE to prevent them from using those drums, hence you are fighting the entire camp (or at least a very big amount of them) when you do go for the fighting option.
Maybe the lack of suprise round is a bug or something but I honestly see no way of doing this fight and coming out on top...