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I'm sure you're well versed in how Page Rank works, but some times it's good to have someone else explain it with a metaphor. And what comes to mind is Ian's old post on this here: http://www.conversationmarketing.com/2010/09/pagerank-without-math.htm Following his line of thought on the subject, I'd say yes overall restricting the amount of links in the menu will be beneficial. Some of your sub-sub pages may lose some PR value, but it will also likely increase the PR value of your main pages, and give you a good chance of ranking higher for more competitive keyword terms.