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I never considered that question, apauto. Do you see some evidence that there is a difference?
tedster, I never did any research into it, I was just thinking that if Google considers subdomains as seperate sites (for the most part), if you are cross linking from subdomains, do you pass PR differently from this, than from a subfolder?
From the effects I see, both subdomain and subdirectory links are treated as basically "internal" for most sites -- that is, they seem to be dampened a bit because they are uner the same owner's control. Of course this is not a blanket rule, because for some domains such as blogging platforms, the subdomains are under the control of different authors.
I'm not a PR algo expert but it seems like this has been happening in most PR updates over the last year or two. I believe it's because PR is getting spread thinner across more sites, as more and more sites come online. so it used to be easier to get a pr6 site, not it's tough to get a pr5.
Or I could be talking out my butt since as i said, I'm not a PR algo expert :).
Has anyone else noticed this?
I'm on vacation on a remote island right now and surfing with my cellphone, so I can't check everything this month... but I'm delighted with the increased recognition my site is getting, even if PR is pretty meaningless these days. It's three years old and totally white hat. I also rarely request links and just wait to attract natural links. I sure hope it pays off.