site:mysite.com and site:www.mysite.com give the same results

site:www.mysite.com and site:mysite.com give the same results.
also:
link:mysite.com and link:www.mysite.com give the same results.
both:
http://www.mysite.com and http://mysite.com show the same PR.

there is no redirection from http://mysite.com to http://www.mysite.com

shall I be worried? site ranking very very well.

 

This is how it should be done. Make sure to put the 301 redirect though.

 

can you elaborate?

 

I don't know how you got that without redirection but you don't have to worry because you have to have this anyways. Add the permanent redirection to the www domain to make sure you will always have this and avoid the duplicate content.
search in the forum for 301 redirects.

 

so that means google does a good job canonicals this time?

 

Hopfully with Google new Big Daddy algorithm (introduced soon) this will always be the case