A backlink means that the search engine gets to your site through a hyperlink from another site. So a site that references your site in text only and does not format a hyperlink will not provide a backlink for you. The search engine does not have anything to follow in that case. Or I could be wrong, Dominique please share what page you found providing a backlink this way if you don’t mind.
Was that your question Roo? Reading this again, maybe you meant if it will count as a backlink if it’s a hyperlink without the www subdomain?
The www subdomain is really not needed, and often is the incorrect way of accessing a site. Depending on your ISP/server, http://www.bingohall.com and bingohall.com will be different, the same, or redirects. Your email isn’t roo(at)http://www.binghall.com – neither should your web address be.
It’s really useless, saying duba-u, duba-u, duba-u my site dot com waste a lot of time in commercials and so on!
Additionally, (www.)bingohall.com/ is the best way to link to your site, don’t forget the slash.