No, he's completely right. Regardless of what the framework may or may not allow, the fact of the matter is that most .NET web applications are using the full A

No, he's completely right. Regardless of what the framework may or may not allow, the fact of the matter is that most .NET web applications are using the full ASP.NET stack, which means that it's the place where most of the mindshare is, so for all practical purposes it would be more difficult to find people who aren't using it, and if you aren't using it then you're probably using another technology stack. For that matter, when using just the base .NET framework for web development, I fail to see any advantage over Python or Rails beyond familiarity, and many disadvantages.