deadsea - 10:43 pm on Feb 25, 2013 (gmt 0)
Given how ambiguous his answer is, how can we devise an experiment to actually test it? Maybe this would do it.
Create a chain of ten pages. Link each one to the next. Put some unique content on each page. Put a link to the first page from somewhere.
Create a second chain of ten pages. Link each one to the next but in such a way that there is a single 301 redirect. Put a link to first page in the same place as the other link.
Create a third chain of ten pages. Link each one to the next but make sure each link does two 301 redirects to get to the next page.
Let it run for a month and collect log files. Measure how many times googlebot visits each page. All other things being equal (especially freshness) Googlebot will recrawl pages proportionally to their PageRank. See if the chains get the same number of re-crawl visits from Googlebot. If they do do, then 301 redirects have no negative impact on passing pagerank. If the chain with no redirects gets crawled the most, followed by the chain with one redirect, followed by the link with 2 redirects, then 301 redirects leak pagerank.