Without seeing some kind of properly conducted scientific test that examines a range of conditions (age, native language, current typing ability on QWERTY, typical typing material, etc) it doesn't seem worth the effort. If Dvorak (or Workman) is that much better, then it's surprising nobody has been able to conduct such a study.
All of the evidence out there, however limited, is in favor of Dvorak (that 1996 Reason article you linked not withstanding). Lower finger travel = less strain = less RSI.
The advantage of Dvorak is no more "theoretical" than the theory of evolution. Whether it's "worth it" for you to switch is aside from the inherent performance of either layout. I can say that Dvorak is better, while not being worthwhile for you to learn, though it was worthwhile for me.
Without seeing some kind of properly conducted scientific test that examines a range of conditions (age, native language, current typing ability on QWERTY, typical typing material, etc) it doesn't seem worth the effort. If Dvorak (or Workman) is that much better, then it's surprising nobody has been able to conduct such a study.