ASP.NET MVC is way too much of a RoR clone than is good for them. C# programmers aren't used to magic: they're used to compilers telling them about typos. Convention over configuration is nice, but it's essentially the concept of dynamic typing translated to frameworks. It fits badly in a statically typed language.
I'd have much preferred ASP.NET MVC to have less magic and, for instance, decent, controllable, IDE-supported and compiler-guarded routing.
Example: in an action method, parameter names are mapped to URL parameters. This is horrible, I should be able to change the parameter name in any method without calling code being affected. Or, when this is not the case (e.g. when C# 4's named arguments feature is used in calling code), I want a compiler error saying that calling code can't find the parameter anymore.
In ASP.NET MVC, I get neither of those things. I might have as well gone Ruby all the way, then.
In short, it's brittle.
Compiled languages have pros and cons, but if you're compiling anyway, please use all the pros to the max. APS.NET MVC doesn't, and that's a shame.
It's still a nice enough framework, but it screams "missed opportunity", much like all those Java libraries that were ported over to C# back when .NET was new.
That being said there is definitely a deficiency in strong typing in ASP.NET MVC as-is. That's why I use T4MVC (http://mvccontrib.codeplex.com/wikipage?title=T4MVC_doc&...). I'm not too sure how the MVC team have done things much differently, though, without overcomplicating the framework... you'll note the T4MVC approach is based on code generation that inspects your source tree.
I think code generation from inspecting source trees really is the future for compiled languages.
I used to think that the only reason to generate code (instead of using reflection or interpreting some DSL) was speed. I missed how code generation gives you excellent additional features, such as more compile-time safety and, most importantly, excellent IDE support. Once my code is generated, I can talk to it from other code like it was a hand-written library including all the IDE goodness (API discovery through autocompletion, etc) that it comes with.
I really hope they'll keep making T4 even more awesome than it already is. Combined with Roslyn, I think we'll get some pretty cool tools ahead that we can't even fathom now.