walkman - 1:25 am on Oct 30, 2006 (gmt 0)

>> 1. Google evaluates the content section of a page differently from the rest of the template.

TRUE. I remember reading how google takes out everything else that is repeated and leaves the core of each page. It was one of the founders I believe.

>> 2. Google is using human editorial input to affect the SERP.
Probably. They might check pages that are borderline or pages to get a seed.

>> 3. Using a dedicated IP address helps in ranking.

Myth. Most sites do not have dedicated IPs so why give those who an advantage? It probably started with guys have 400 spammy sites on a few IPS. They got banned or penalized for different reasons; the IP was just a coincidence.

>> 4. Seeing any urls tagged as Supplemental Result means there is a problem.
Most likely there is a problem, especially if they are too many of them, or worse, all of them.