Actually, yes there is. Disney doesn't "do" reservations like any other restaurant. They basically save you a spot in line. So if you check in early (and they allow you to, you absolutely can not at CRT!) you'll be seated at the next available table for 3, after all the others before you have been seated.
Also, if it's a pre park opening, they don't hold you at the gate, they simply check off your name as you're admitted. So, you could conceivably go through security at 0745 (even better) and be one of the first in line .