I picked too many upsets, so my bracket sucks, but if you stuck with the top seeds, you'd be set right now.
All 12 of the 1, 2, and 3 seeds made the Sweet Sixteen, plus two 4 seeds, a 5 seed, and a 12 seed. Only two "upsets" at that point, and only one was actually any kind of surprise.
And now, in the Elite Eight you have all four 1 seeds, two 2 seeds, and two 3 seeds. Kudos for picking them right, but it's rare you see the bracket this clean this late in the tourney. Even the first round upsets seemed to be somewhat down this year. You had quite a few 12-5 upsets, but it didn't get all that crazy.