Yes Dave rumors abound!

My research of the Google Patent (pending) indicates that dedicated IPs are better in that with linking to/from sites, the excessive internal linking on the same, and even similarly a/c blocks of IPs, may become "devalued" for a quick, short and to the point answer.

No doubt, for every answer, you'll find a naysayer, but that's my understanding.

Hopefully, someone else can provide a little more detail on the subject for you, but that's the nutshell of it, as I understand it.

Good luck and happy ranking.

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W. R. Mineo