Here I am, a Level 19 on Master difficulty. It's 1:00 PM on a clear, sunny day in the tundra. My sneak skill is 77, I have a steel dagger, and I haven't visited High Hrothgar yet. I put on my gloves that I got from doing a tiny DB mission, sneak up behind a giant with two mammoths, and kill all three in three strikes. From a steel dagger. I stabbed the giant in the ankle. Unless this giant is Achilles, this shouldn't happen. Sneak is totally overpowered. Wearing things like Jester gear makes you impossible to see.
Anyone else have absolutely ridiculous experiences with sneak?