On one hand, sure, if early season games were a reliable bellwether for the eventual Super Bowl champion, then most winners would look very different. I remember in 2007 after week 3 a Giants fan friend complaining the Giants had no playmakers and couldn't stop anybody. In 2014, the Patriots were 2-2 after week 4, having had no answer for Knowshon Moreno as the Dolphins came from behind to beat them in week 1 and the Chiefs crushing them in week 4 after two unconvincing wins against bad Vikings and Raiders teams. The cautionary tales are endless.
On the other hand, Brady played like a 40 year old, the playcalling was atrocious, injuries are already piling up, and the defense is slow and full of bad players and rookies.