Yes, it was predicted successfully (by everyone who is no longer holding a contract). It was also not predicted successfully (by everyone paying through the nose so they won't have to find a place to stash some barrels of a volatile compound).

It wasn't predicted successfully on average. Otherwise Friday would have already anticipated today's price.

How far do you want to take that argument? If successfully predicting it would mean that prices dropped to zero on Friday then shouldn't that have also been successfully predicted and impacted the price on Thursday? What about Wednesday, Tuesday, Monday?

Yes, that's exactly right.

But no one expects perfect predictions far into the future.

Well, that was exactly the question!