To your last point, with the nuget package manager it's becoming easier to integrate the latest and greatest into your projects. For example, here's a nuget package that makes sass and coffescript a 'one click install' in your asp.net project: http://blog.paulbetts.org/index.php/2011/05/16/announcing-sa...
But like you mentioned, being easy to integrate isn't enough, you'd still have to justify it, which in a big company is more difficult than a start up.
But like you mentioned, being easy to integrate isn't enough, you'd still have to justify it, which in a big company is more difficult than a start up.