At the end of the day, it is experience that really matters. I've played with some 32s that turned the raid into swipefest. It also comes down to skills. There's plenty of 32s that are not skilled. That being said, chances are that anyone 31+ has the experience and knowledge to go through the raids smoothly. Personally, I want someone that's actually ready for the raid. Hell, I didn't even go to hard raids until I maxed out my weapons, and had a solid oracle killer. I expect the same.