ProbablyMike - 11:45 am on Jun 21, 2011 (gmt 0)
One thing I've noticed a lot is that if you tell "the man on the street" to go to example.com they will instictivly start typing www
But as long as the redirects work properly then I don't really see a problem.
The problem starts if you have other subdomains, I've witnessed my Mum do this.
I said "go to news.example.com" and she entered "www.news.example.com" which gave a DNS error.