Rothe said:

Got to laugh on that last one. Obviously, Mr. Gygax's use of the term "material" and that propounded by the SEC vary greatly.

The cavalier sounds like an uber character that would far outshine any other, unless his xp chart was much more difficult.
The cavalier's experience point chart was tough, but not especially so. To advance as a cavalier required the following experience points (I have listed the experience point total at which one would advance to the level listed, and what level a fighter at the same experience point total would be):
Cavalier 2 2,501 Fighter 2
cavalier 3 5,001 Fighter 3
cavalier 4 10,001 Fighter 4
Cavalier 5 18,501 Fighter 5
Cavalier 6 37,001 Fighter 6
Cavalier 7 85,001 Fighter 7
Cavalier 8 140,001 Fighter 8
Cavalier 9 220,001 Fighter 8
Cavalier 10 300,001 Fighter 8
Note that at upper levels, the Fighter is stuck at 8th level, while the Cavalier rockets past him. And the cavalier is never more than a few thousand experience points behind the fighter in advancing to a particular level (the biggest gap is 8th level, where the fighter advances to 8th at 120,001 experience points, but the cavalier needs an additional 20,000 experience points to catch up, at all other levels, the gap is smaller, or vanishes entirely and is reversed).
Oh, and one ability of the Paladin once it was attached to the Cavalier that I forgot - they would advance their Charisma score just like (and in addition to) the ability of standard Cavaliers to advance their Strength, Dexterity and Constitution scores, so they would almost certainly end up with 18/00 Strength, Dexterity, Constitution, and Charisma by mid levels.