Just to put some stats to this discussion, I pulled the
average points per game (per team) from Pro Football Reference. Not that there's anything magical about the 90s, but the average number of points scored per team per game was 20.15 from 1990-1999. I then looked at the
average points per game for this year's offenses.
To cut to the chase, 24 of the 32 teams would be an "above average offense" in the 90s, and the closest team to the 90s average is the Redskins (and Cowboys). So there ya go. Alex Smith would be the leader of a league-average offense in the 90s.