frankleeceo - 2:32 am on Dec 16, 2012 (gmt 0)
What is it really is in your mind?
I do think Google is actively managing the traffic, but not to any individual sites as a conspiracy. It is not in their best interest to do so. It is more managing the internet as a whole. It's not really a cap per se, but more or less, the internet traffic is limited. One site has to lose traffic for another to gain. A more worthy site gains more visibility and "steal" traffic from another site. Or can lose traffic to another site.
Isn't that an active role of an index? To ensure that visitors are happy by visiting the sites in its index. Thus they would have to monitor the visitors flow before and after searches. With that, they can make active adjustments based on groups of sites.