g1smd - 7:02 am on Jun 21, 2011 (gmt 0)
Yes, it is a neat convention that most sites have adopted, and which does not have to affect the branding in any way.
We all know it as Google or Google.com, but if you type that in your browser address bar, they redirect you to www. google.com.
The same applies for the vast majority of sites, all over the world.