when a site transferred to new owner, how much is the traffic affected. Lets say you move it from original server to new server. From dedicated server to virtual server?
There would only be a major difference if you changed which country the site resides in, otherwise you shouldn't notice much or any difference.
In March of 2005 I changed the ownership information on a domain from my personal name to a business name. I made no other changes to the site; same host, same content, no link building etc. By June my traffic and income dropped by 2/3's. I thought perhaps it was a seasonal thing and there was less traffic in the summer. The income recovered over the next few months. In June of 2006 I was back to the former level. One case does not constitute proof of anything; however, I don't know of anything else that might have caused this. YMMV
you may slip in SERP but that will be just temporary, and there would be a problem if you retire the old server early as some of the links will still resolve to the old server...Give it at least two days or more to propagate the new server's ip address.
You can avoid this as well if you plan properly.. First transfer the files to new server completely, then change the nameservers.. This prevents the crawlers getting into an error page.. On the other hand its like nothing has happened and it will be a usual crawl.
Yes it does. If you host a site in the UK, it appears predominately on the UK SEROS, in the US then on the .com SERPS. The .com results obviously produce more traffic though it's less targeted.
But Google does . If you're looking to rank in Google.com, best to host in the U.S. It makes a noticeable difference. If you can at all, consider not changing the whois information, or maybe just the email address.