It seems to me that Mr.Dunn is simply defending his products and voicing his opinion ..

I understand where Rob is coming from .. scepticism, but Mr.Dunn has made no outrageous claims or even pushed his products.. except to give advice about compatibility.  Rob's disdain for the results of Mr.Dunn's research is rather rude and somewhat unfair - And as Mr.Dunn is still in the business of selling his products - is rightly concerned with being portrayed as a 'phoney'...   Moreover, Rob seems a little concerned with getting the last word in .. hence his 'GO AWAY' comment .. but tenacity is the order of the day