They have been misquoting long before google and the Internet, indeed. But the misquotes almost always were 'stolen' from older misquotes from other religious groups whose stance coincided with watchtower's in a particular matter. For example, check the misquotes regarding evolution (in the 1985 Creation book, for instance): they are almost all taken from old Christian creationists like Henry Morris. We are talking not about cut & paste from original writers, but copy & paste of misquotes from other ridiculous books!
So yes, I tend to agree with you: they probably are not intellectually equipped to even construct their own misquote. Nowadays, their anti-science misquote armory comes mostly from the Discovery Institute (the good old Creation Institute after facelift) and their "Intelligent Design" mumbo-jumbo.
Don't forget that every assignment in the Borg and is a so-called "spiritual", or "theocratic" assignment. This, in secular English, means that requisite for any assignment is typical JW things, such as sucking your "above", being good in congregational things, good speaker, having a broad jw social network, having fame inside the org, etc. In other words, nothing like scientific capacity and intellect. This of course includes assignment in the writing department.