Bull.
I looked up a couple dozen random citations from his Original Intent, and all were accurate.
http://www.wallbuilders.com/libissuesarticles.asp?id=126
The above article is about the best that could be said of Barton - that he is sloppy and has proffered NUMEROUS invented quotes.
The following article is less charitable to the charlatan.
http://rationalrant.blogspot.com/2011/11/david-bartons-unconfirmed-quotationsthe.html