Sorry, that was me above, but yes he used ‘Carter’ style as well on a lot of stuff like Colours, etc. I have to say the frailing guitar style in the right hands seems to be a good development of the bluegrass flatpicking style, because the latter relies largely on other instruments providing the chord backing to my mind. The beauty of Travis picking is that you can provide your own rhythm and bass lines as well as the melody, plus you are not tied to either just standard tuning or an open tuning (in the case of frailing).