Check instant file initialization without using trace flag.

The article http://blogs.msdn.com/b/sql_pfe_blog/archive/2009/12/23/how-and-why-to-enable-instant-file-initialization.aspx explains how to check the instance file initialization status by using a trace flag and creating a new DB.

I don't want to use this method in a live environment. Is there another way to check the status of instance file initialization?

Mr Shaw