This might seem like a strange question but does Google's ranking algorithm look at what nameserver a website uses. For example, if it uses an enterprise dns provider does it rank higher?
I appear to have seen some evidence of this.
Google's algorithm is myth-ed to include things like name server IP and C class IP of the hosting, if you Google SEO C Class your see lots of hosting packages and articles offering this kind of information, some people swear by it when making vast linking networks and some people debate it....
This is because you could buy a reseller package on one hosting package, with 100 ip's with the same C class, and same name server and setup 100 sites with 100 different domains linking to one site.. the only foot print left assuming that your not linking in patterns such as
A > B > B > A > C > E > F > A would be the IP address of both the hosting and the servers.
So while my personally belief is that its very likely that Google does in fact use algorithms to detect linking networks as it would be silly not too, but its one factor of many and no way just the only factor. Your more likely to slip up with the pattern of linking and get caught.
And with this said down to the question you asked, it's unlikely that Google use DNS provider detection and reward more for CompanyA than CompanyB as their is little difference between provider and that what Google can detect.