Nope. I've been a size queen for as long as I can remember. Although I prefer smaller anal toys, larger ones don't intimidate me. I don't feel it's a contest to see who can "take" the largest toy. It's about what works for YOU! If that's a 3 inch in circumference toy, then that's fine. It it's a 6 inch circ toy, that's fine too.
The Great American Challenge is really more of a novelty item, the only people I've ever heard of who really use them are those people who do videos on "Extreme Insertion." These people also use things like 2 liter bottles. A rare thing and not something something I am interested in doing.