<i>it squares with my own experience</i><p>The placebo effect can make <i>cancer</i> go away for a while.  Vanishing RSI is trivial.<p>You're especially at risk because you've already sunk time and effort into retraining yourself, and have made a conscious decision to separate yourself from everybody else.  That's Big Magic, psychosomatically speaking.<p>None of this means you have to go back to QWERTY (or for that matter, that QWERTY is any less broken).  But if Dvorak's research really was shoddy and self-serving, and you want to take care of the hands you presumably use to earn a living, wouldn't it be a good idea at this point to look into other keyboard layouts with better-documented benefits?<p><a href="http://en.wikipedia.org/wiki/Escalation_of_commitment" rel="nofollow">http://en.wikipedia.org/wiki/Escalation_of_commitment</a><p><a href="http://www.paulgraham.com/identity.html" rel="nofollow">http://www.paulgraham.com/identity.html</a>