Use Different Nameservers for SEO purposes?

Jay if you were to change DNS on a existing site it would cause Google to re-evaluate your site which may or may not cause PR and rankings to drop. If they are new sites that you will be building, spreading out across different DNS's would be more of a personal choice but nothing that could or would affect rankings.

Of course this is all theory, just like hosting on different class C IPs as opposed to class D is in order to avoid being detected as the owner of similar sites.

If Google wanted to use every means possible to track which websites belonged to the same person, three main things are available to them from a whois lookup - The registrant, the nameserver IPs, and the hosting IPs.

Whilst not many people are likely to be hosting a site under the same hosting IP (perhaps a thousand), many different people may be hosting under the same nameserver. Therefore using the nameserver alone as a means to detect websites belonging to the same person would be impractical.

However, if the whois details were identical, along with the nameserver, but a different hosting IP is used, then wouldn't that indicate to you that a site is possibly hosted by the same person? How about in the case of a privately registered domain, but from the same registrar, the same DNS, and the same hosting IP as another person, with similar link building strategies?

No one knows for sure all the things Google may use to determine the owner of multiple sites, but I'm just throwing around possibilities.

It's the same as with using different class C IP's. If it worries you, then use different nameservers, if it doesn't, then don't. I'd say that Google most likely wouldn't be using them, however everything is a possibility.

I guess the answer is as with most things when it comes to Google: we're left to guess and speculate.

Since I'm changing hosts anyway, my sites are changing IPs. Might as well throw a few new DNS in there.

By nameserver do you mean, the server of the company you register with, i.e: Godaddy, namesecure and namecheap? So is it best to register with different companies or alternatively how do we change the settings?

are you sure this would help?!
thanks anyhow