Anyway been meaning to do this for awhile. we've not had a thread that actually prevented proof. So I Just dived into Register Compass and looked at a few PR4s listed. Here are three PR4s of note. You can find a bunch more any time
dentsonline.org PR4 DA 1 Trustflow ZERO
fceds.org PR4 DA 1 Moztrust 0 Trustflow ZERO
pixellence.org PR4 DA 1 Trustflow ZERO
In all three examples DA and trustflow beat the pants off of pagerank. To my backlink check all or almost all of these are worthless domains but because the market still insists on following PR they are snatched up either because the people who snatch them up know no better or because they are looking to fool link buyers that they are valuable.
Consider this. These domains will continue to show PR4 for as long as Google does not do an update to the tool bar (and even after if the update is incomplete or based on an earlier date).
PLEASE NOTE - They are ALREADY worthless for ranking because ranking does NOT depend on Toolbar PR
There are literally HUNDREDS of PR4s and up that have lost all their links but Google will not update them for a very long time.
Why does Moz and Majestic catch these and accurately record their worthlessness? Because Moz and Majestic are services that only have the interest of their subscribers in their business model. As such they update much more often and regularly. Google has a vested interest in keeping webmastes in the dark because they are in the business of search engine and adwords results.
Now of course some would say the others metrics can be gamed and that's true but because they are updated often the inaccuracy is for predictable reasons - usually spammed links. There is a world of difference when you know how a metric may be gamed and can therefore adjust for it and one that updates sporadically AND can be gamed as pagerank now is
In the case of High DAs a quick check of a high backlink count reveals a spammed domain and that will catch a ton load of bad high DA domains. When combined with trustflow faked DAs will generally show up even more if the trustflow is under 15. Edit - another key to look at is nofollow links which DA does not handle very well
As always before buying a domain or a link the backlink count of the resource should be checked. There is also a new backlink tool to go along with it
Looks to be a great tool but its also a kind of search engine (well not quite yet). Majestic apparently will be announcing today their "search explorer" product which will show the rankings for certain keywords according to link data they have.
Majestic SEO Search Explorer
Of course this won't match up with google results but by typing in a keyword (will be limited in words at first) and cross matching it with Google you MAY ( other things play a part in ranking than just links) get a better grasp off how their trust flow measure up in real serps. We probably will not to see PR soon and its way off now anyway due to few public updates.
Anyway between Moz and Majestic the loss of pagerank data should have very little long term effect. So little that I wonder if Google would not be better just leaving the false data up to fool link sellers and buyers that it still has use when it no longer does.