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But no, it didn't hurt changing IP's at all. Just the downtime was nerve racking.
Once from a shared IP to a dedicated IP on the same server- that was OK, took about 2 days to update all the DNS's ( Data Name Servers )
Second time was Shared Hosting to Virtual Server - although we were allowed to load the pages on the new server before the ISP wiped the data on the old server 2 weeks or so later.
A change of IP doesn't always mean a server change.