Most importantly, cresciano is a really, really nice place - the problems are fantastic, and the weather is much more reliable than font.
I mean when was the last time anyone did similar feets on recognised hard problems in the UK? And I'm not talking about Peak B12's I'm talking about proper graded stuff.
I disagree Percy, there are plenty of examples of V12s and V13s in the UK that are either unrepeated or have had only a couple of ascents: Cherry Falls The Ace Pool of Bethesda Malc's Start Diana low start Isla de Encanta
footholds have enlarged the handholds got better etc.
everybody also knows that mushin is 7c+, v10. everybody says this is a soft touch but surprise, surprise not that many have done it. i will concede that RU thinks this is easy 4the grade. seems to suit the smaller guy to weight the toe hook