I don't know if I agree with this. I've worked on large MVC applications for government, they definitely exist. MVC is IMO a simpler (and more consistent?) beast than aspnet, and in my experience doesn't have the same lazy legacy/dinosaur developers, so there's a smaller volume of questions for the number of lines of code written.

.NET vs Ruby is a whole holy war which I'm not going to get into, but there are a lot of people out there who like to get shit done, and find that .NET (and MVC) works just fine (great even) for that.