wow.. pr 0 to 6 in 2 years? how much good quality links you got in 2 year? And how long have you been waiting for pr6? I think if you do the same in 2 years, soon you will get pr6. (you now the road already..) Good luck..
I agree with opinion from bluebenz Its hard for get PR0 to PR5, but if Master_Yoda can solve that. And you have achieved got PR5, maybe its easy for get next PR (PR6)
i wondered the same thing.. why is that open source websites have such high pr? all the applications that I install for ubuntu ' the programers website ' is always pr 6 or higher.
pr 6 and more not difficult task, ongoing effort will surely help in pr. u can check my signature link, u get idea.
it's not that really hard as long as you have quality back links. but it really takes time to accomplish it.