But if PR depends on backlinks, wouldn't having higher PR put you higher in the serps? This is assuming that your PR is based only on a high number of backlinks. If not, what other factors are involved in getting high PR?
this actually refers to website freebies. if you're giving your visitors some freebies, then they will surely keep coming back and would even recommend your site to other people.
Congratulations.. Well, PR doesn't depend on the age of the domain, rather on the backlinks and the quality of them. Maybe the backlinks you have did the magic.