Basically, a link from a page with a long list of links has lesser value. Reciprocal or not.
Reasons:
1. The strength (let's say the PR juice) is divided into many outgoing links.
2. Search engines may regard a page with hundreds of links as a page of low value. Search engines recommend not to have more than 100 links in one page (although webmasters go usually beyond that limit).
When the links are reciprocal between sites of different themes, they may have a lesser value than one-way links as for search engines. That is why people may prefer triangular exchange links.
Last edited by jose; 09-27-2009 at 06:54 PM..
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