Who is Henry Raddick?

I've always been in awe of Henry Raddick's insanely funny reviews on Amazon.com, and was disappointed a couple of years ago when it seemed as though he stopped writing them, or turned his attention elsewhere.  It occurred to me today to do a little googling around to see if his real name and/or whereabouts could be determined, but to no avail.  The wikipedia implied that he might have been William Donaldson, a British comedian of the Dudley Moore/Peter Cooke era who was largely known for writing satirical letters to people in power under the pen name "Henry Root" (Raddick's surname is an anglicization of Raddix, the Latin for "Root").  If this is true, it would explain why Raddick no longer performs his uniquely e-commerce specific brand of comedy, as Donaldson died last year at the age of 70.