That is true, but what I think fueled that is people were hedging their bets on these films because of how poor the prequels were. But we probably should have noticed that most of the prequels were financially successful.
I did think that if any film had the potential to be the new record holder it would be Star Wars, but I was also hesitant because it was being released in December.
I'd have to go back and look because I don't remember exactly what my prediction was, but I thought that AoU would get the weekend record but that it would gross as much as the first Avengers, and that TFA would not win the weekend record but would gross as much or more than AoU, by having stronger legs.
You have to be fair in that this is unprecedented. Does it surprise me that this film is the winner? No of course not it's Star Wars. On the other hand it surprises me that it's gotten there this fast.
The bigger surprise was Jurassic World, but when that film got the record (and just barely), I thought TFA had a chance, but never expected by this much.
Keep in mind this is beating Jurassic World next week as the no 1 move of 2015.