Yes, it would. In the original theory, Type A and Type B were opposite types in relation to how we handle anger. Type A (linked to coronary disease) tends to be angry and authoritative and expressive. Type B tends to be self-repressed.
Some people have suggested a correlation between Type B and susceptibility to cancer. Others have proposed that it can be linked to a weak immune system.
It is a generally accepted truth that, when people who repress their feelings finally do blow up, they do it in a big way. We see this in spree killings. The typical spree killer (when it is not a result of drug abuse) is a quiet type B person who explodes violently.
We all benefit from becoming aware of our natural tendencies and learning new options. Type A folks can benefit from self-awareness and self-control, such as anger management. Type B folks can benefit from self-awareness and self-expressing, such as learning to tell people how they feel, and learning to insist on respect in healthy ways.