I think so it is difficult to get PR5, my highest PR for my site is only PR3 but now down to PR1. The difficult thing is to maintain backlink, because it is always dis-appear .
To be honest, i think pr means nothing, i see site which is pr0, and it is the 2nd in SERP, the first is a pr4 site, the third is pr4 site, the others on first page are all pr3
If you want a PR5 that badly, you can get one within hours. Just get your wallet out and head over to the domains sales section
I don't know why people are so desperate do get higher PR. Ok, I know it sounds great when you hear some site has high PR, but I would rather had low PR and huge traffic, than the opposite. I even read that people in Google are thinking to cancel the PR.
People still talking bout PR? The only thing this was good for was link selling.... I have PR 0 sites making me ton of money... But to answer you question, it's much harder to go to pr5 from pr4 than it was to go to pr3 to pr4. It's an almost exponential relationship
Is it easy to get a PR5 website if you will post you link on blogs or pages that has a PR4 or more. If you will build 50 links everyday which is PR4 or more for a month. I'm sure you will get the PR5 or more on the next PR update.
I have never gotten a PR5 easily, i did have it once on one of my sites, i think about 2 - 3 years ago, i guess it might have been easier to get, i dont remember what i did.
it can be done in two ways, either you buying high quality links or you do it manually, if you do it manually, make sure you are linking with high pr pages..
It's really hard to get a PR5 if don't know the techniques. In order to get a PR5, you must target a do-follow website and a website that is much higher PR than you. Don't spam and don't submit anymore to lower PR than your website.