Gary Macleod wrote:From what I remember I think barrueco was more into apoyando and Shearer wasn't.
I think it might have been the other way around.
I'm not sure about Barrueco but most professionals disagreed with Shearers relaxed fingertip joint approach as part of the right hand technique. Shearer himself later later said that he would not have advocated it if he were able to go back in time. Personally I found the approach very helpful in overcoming a tendency to "claw" the strings and to eventually gain better control over my tone production and reduce tension.
Shearer was also criticized for advocating apoyando almost exclusively as a mechanism for bringing out melody lines and he later recanted on that as well.