I am kind of confused and would like the experts help in getting some explanation.

When I click the Query (i) button on Google tool bar for my web site (http://www.irisfirm.com/) and do a search for backward links, it uses (link:www.irisfirm.com) to do the search. With this search, my site returns zero results for backward links in Google.

But when I do a (+www.irisfirm.com) search on Google, it returns many links.

I have also tried many other tools that show quite a few backward links on Google.

1. So, what is the difference between "link" vs "+" search?

2. If it is not the same, which one is counted towards your PR?

3. Can I do something to my web site to get results on "link" searches?

4. Do I even need to worry about this at all?

Thanks

Seth