Honestly, I think I'll take 'average' php code over 'average' .NET code, I just did a 18 mo. stint at a .NET enterprise environment after 8+ yrs of PHP(Drupal, so maybe the bar is higher, not saying it is, but maybe).
I don't have any substantive evidence for this, but I suspect you'd see very different characteristics among people who work on SharePoint and, say, MVC/WebAPI.
I started out as a PHP web developer and started developing in .NET when it was released. At this stage, I've been developing applications in .NET for 15 years. Whenever I have to look at a PHP project or ASP classic project, the code quality is usually much worse than other languages. ASP and PHP make it really, really easy to do things wrong.
