I haven't heard all these guitarists, so I can't comment on the overall quality of this guy's choice for the 100 greatest rock guitarists, but it has some credibility with me because he got No. 1 right (and I wouldn't argue too much about the top 3). No one before or since Jimi Hendrix has gotten closer to pushing the guitar to its full potential; of all the rock stars who died too young, his, before he reached the limits of his talent, if he had any, was the greatest loss. And, luckily for him and all of his fans, studio technology advanced just enough just in time to be able to produce the sounds he heard in his head.
After my first read through the list, I'd probably move Eddie Van Halen down a bit and Carlos Santana up a bit.