Well, it seems that word of Murtazin's comments reached the Redmond campus which elicited a huge belly laugh, or guffaw from the Windows Phone Design Team. It was definitely meant as more than a chuckle. In a tweet, they wrote, "Scrapping everything and starting over? Hahaha."
Now that doesn't mean that the team isn't hard at work at making other changes, but don't expect the next iteration of the mobile OS to be built from the ground up.