While I agree that is very good I think if after seeds came out if you took the higher seed until this round you would have a similar success rate. Glanced at brackets this morning and I think top four seeds still playing in all but one classification. There have been very few upsets of seeds so far, except maybe 9 over 8 or a couple of mid teen seeds winning. Still an impressive track record so far.
Things start to get more difficult to predict however beginning Friday.