I'd say just the opposite. Things like deployment and things like gems are the big issues. Actually day to day dev work though, I think MVC is probably at least as productive as Rails or Django, if not moreso. But I think its personal taste more than anything else.
Code-generation has always been a major annoyance for real (ya, I said it) developers using MS tools. It'll be interesting to see if recipes are able to do what decades of similar promises from MS have failed to deliver.
I don't think Recipes are really meant to address codegen. It sounds like a simpler way to build Wizards, not much more than that. MS's solution to general codegen are things such as CCI (http://ccimetadata.codeplex.com/).