One of the main reasons not to anchor would be for the purposes of muting. If you anchor on the E and B strings, it is unlikely you will do an accurate job of: muting the G while playing on the B string muting the B while playing on the E string at the same time as: keeping the B string quiet...
Good points made so far. Make sure you are comfortable holding the pick and the guitar. Before you play anything you should be relaxed - no tension in the shoulders, neck, forearms, hands etc Gripping the pick is probably the biggest factor I have come across that will restrict speed and make...
Already mentioned on here but I too can't recommend Waghorn enough. My guitar will be ready in several weeks and is looking to be an amazing instrument. The contact has been exceptional and Tom is clearly a very passionate luthier. The prices of his guitars also blow my mind, incredible value.