TheMadScientist - 6:43 am on Apr 14, 2011 (gmt 0)
Hmmm, I think it's a bit more complicated than that seoN00B ... I have some sites registered at GoDaddy and use their NS system with custom A records, and I'm fairly certain they're not 'lumped in' with all the sites hosted at GoDaddy using the GoDaddy NS system ... I guess they could be, but I doubt anything's quite a simple as it seems.
My guess and experience says, unless there's some 'goofy interlinking' to try and hide it's probably 6 of one and half dozen of the other, maybe 5.9 of one and 6.1 of the other, but I haven't seen a difference in rankings based on shared or dedicated IP Address personally.