I would say no to that. Sunny laid an egg somewhere between 16-18 weeks old. So, I'd say sexual maturity can be at standard rate or slower. She did not lay well. I maybe got a dozen eggs from her over the course of her lifetime, while Pearl, MMs CX, laid more. I don't think sexual maturity was ever taken into account with CXs as that wasn't ever supposed to be the option. Therefore, I think you will just have to watch and see what your's does.
I think that we are the ones that are going to have to study and post our findings on this as I don't think that scientists are interested in this one.