Jody Nimetz admits that this is a difficult question to answer, noting that while the
focus was on paid links at the moment, a site with too many reciprocal links could still be penalized. When link building, "the goal should be to seek one way links, as these carry the most weight
with the search engines," writes Nimetz.
If a site is seeking reciprocal links, Nimetz advises that they should come from relevant, authoritative sites that have a PageRank of at least 4.