It is BS! The new Ford GTs use dual disc clutchs for a reason and it is reliability. All the 'it will break if you use it BS' would not set well with the accountants that have to project the warranty expense.
Think about it. This question doesn't take rocket science to solve.
By the way none of the street twins including the GT rattle.
The only thing that I hear rattling is particularily small brains in particularily big heads the act like BBs in a box car.
Come on get real ...