High PR back links but domain PR is 0

How much time google takes to assign PR to websites.
One of my website is 8 months old using wordpress, more than 35 articles which contains 100% unique contents.
Proper on-page SEO and on some keywords, articles of my website are on first page of google.

Following High PR back links are on my page
PR 7 = 1 back link
PR 6 = 2 back links
PR 5 = 4 back links
PR 4 = more than 4

and many back links from PR 2 pages.
All above back links are do-follow also many no-follow back links are also indexed in search engines.

In presence of all above back links, I think, My website should have at least PR 1 or 2, but it's still 0.

What may be the reason?

Last update was in April.
We are still waiting for the next one.

clocker said:

Last update was in April.
We are still waiting for the next one.

Click to expand...

okay, it means I should be hopeful and should not think that my website is not in the dark or in sandbox. As I posted my back link details in my post; what do you think, Is it enough to get a PR 1 or 2 ?

Yep, they usually update every 3-4 months. Not had one recently.

If you have good internal structure (internal optimization) , it is possible you will get Pr ~3

They only update PR 3-6 times a year so just be patient and keep on building more links

wowhaxor said:

They only update PR 3-6 times a year so just be patient and keep on building more links

Click to expand...

Thank You, It means, it is the time to create more back links, so in coming update I can get more better PR

Yup, that's exactly right

Don't worry about PR updates they'll come when they come. Your rankings in G however will improve in almost real time as you build more links so just keep building links