I personally think that most guitarists that everyone talk about today are slightly overrated, some more than others, depending on who you speak of.
As mentioned on an earlier post, I feel that slash is way overrated and Kirk Hammett also.
I know of a guitarist who is surely underated, and is better than Kirk and Slash put together!! And that is ... Paul Gilbert!!! all tjis praise doesnt even do him justice though as he deserves more than praise for what he has accomplished.
Id like ti see Kirk Hammett or Slash complete "Scarified" without missing a note like paul gilbert did on youtube!!!
YouTube - Paul Gilbert - Scarified