Early in the NFL season, there are lots of mentions of players on pace to put up huge numbers. "Ja'Marr Chase is on pace for 1,600 receiving yards and 17 touchdowns," that sort of thing. But most of the time, no one has any idea of which teams and players were on pace for similar things in the past.
Over time, performance usually regresses toward the mean. Teams and players that started super hot will slow down. Teams and players that were terrible early will get better. It's not useful to compare a performance after five games to what other teams have done in full 16- and 17-game seasons.