I think there are two, or maybe three major viewpoints in this debate. Those held by Lennard Zinn: http://zinncycles.com/Zinn/index.php.../custom-cranks and Peter White: http://www.peterwhitecycles.com/fitting.htm

Steve Hogg: http://www.stevehoggbikefitting.com/...gth-which-one/

And the ever-pragmatic Grant Peterson: http://www.rivbike.com/kb_results.asp?ID=54

Who is right? You got me, but it's an interesting subject and much has been written on it, if you're interested.