There is no way to tell and there is really no way to predict the next one. Google does what is wants, when it wants and thats just the way it is! I've heard every three months before and it is generally correct but certain sites have their PR change faster or slower than this. Just focus on building quality backlinks and follow the webmaster guidelines and your PR will increase with time.
I agree with you, we should concentrate on our website rather then what Google and other is doing. Fresh content + Quality links are important for website to real traffic and PR. Infact, i give more value to real traffic rather then PR, though PR is also a important milestone for Traffic.
Exactly... think of PR as your competitor across the street. If you focus on when he is going to be selling a new product rather then trying to find that new product your going to be left in the dust.
My personal site just got stripped off of PR again in the recent update, but it's okay since it was not deindexed.
Instead of letting threads like this take up space on the DP servers they should be deleted immediately. I think destilator is right by saying phrases like 'PR update' should be banned. I really puts a black cloud over the quality of this forum.....even though it is incredibly hilarious now naive some people are! Kevin
Pr you see and actual PR google uses in its algo are different. They gave webmasters a really usefull tool and then promptly took it away. They say it is not that important any more and serps to reflect this with some small PR sites high in ranking. What I am basically saying is ... googler lies to us about PR because it was something that we could use to better our ranking. Any SEO is bad SEO from thier perspective.
My son has a friend who works at Google, and he said that they adjust the algorithm every 3 months, but page rank updates are ongoing and dynamic. So basically, you can have a 4 one day, and a 1 the next, then back up to 4 the next, depending on factors in what they call "the stew". Of course, we don't know what they have in the stew, so unless you check your PR every day, you won't know it's even changed.