[M T]

Were the national championship teams this dominant?

More so on offense.  Less so on defense.  Point differential compared to 1990 is about the same, but my recollection is that Tara teams then would start substituting liberally at 20+ point differentials (more so than today).

1990  FG%: 50.1% 3FG%: 42.1%  FT%: 76.4% Reb: 43.2   92.8 pts/game
  opp.     41.0%       29.2%       66.6%      35.5   66.2
  Top min/game: Azzi 30.4 (32-1 After beating #7 Washington at Stanford by 40, Stanford lost by 3 at Washington. 10 games were 100+ points.)
  NCAA scores: 106-76, 78-65, 114-87, 75-66, 88-81
1992  FG%: 48.3% 3FG%: 36.2%  FT%: 73.5% Reb: 43.0   85.6 pts/game
  opp.     40.6%       32.4%       62.4%      38.6   70.1
  Top min/game: Whiting: 32.0 (30-3; 3 losses to unranked PAC-12 teams. 4 games were 100+ points.)
  NCAA scores: 82-73, 75-63, 82-62, 66-65, 78-62
2021  FG%: 46.6% 3FG%: 36.9%  FT%: 71.9% Reb: 43.4   78.4 pts/game
  opp.     32.6%       26.0%       67.5%      32.3   52.7
  Top min/game: Williams: 31.7
  NCAA scores: 87-44

[M T]

Were the national championship teams this dominant?

More so on offense.  Less so on defense.  Point differential compared to 1990 is about the same, but my recollection is that Tara teams then would start substituting liberally at 20+ point differentials (more so than today).

1990  FG%: 50.1% 3FG%: 42.1%  FT%: 76.4% Reb: 43.2   92.8 pts/game
  opp.     41.0%       29.2%       66.6%      35.5   66.2
  Top min/game: Azzi 30.4 (32-1 After beating #7 Washington at Stanford by 40, Stanford lost by 3 at Washington. 10 games were 100+ points.)
  NCAA scores: 106-76, 78-65, 114-87, 75-66, 88-81
1992  FG%: 48.3% 3FG%: 36.2%  FT%: 73.5% Reb: 43.0   85.6 pts/game
  opp.     40.6%       32.4%       62.4%      38.6   70.1
  Top min/game: Whiting: 32.0 (30-3; 3 losses to unranked PAC-12 teams. 4 games were 100+ points.)
  NCAA scores: 82-73, 75-63, 82-62, 66-65, 78-62
2021  FG%: 46.6% 3FG%: 36.9%  FT%: 71.9% Reb: 43.4   78.4 pts/game
  opp.     32.6%       26.0%       67.5%      32.3   52.7
  Top min/game: Williams: 31.7
  NCAA scores: 87-44