His success has certainly been understated in the SA media.
Whose success hasn't? Robin also has a successful stint with Yes under his belt. But then if you think about it, Rabbit were only big locally for a few short years and then mostly for their cover of Locomotive Breath. Trevor moved on to greater things, but offshore. I guess that in the "local is lekker" years, no-one wanted to point out how successful some SA artists were overseas.
What sometimes gets me though is the SA artists who stayed and in many cases whose music was "restricted airplay" (officially or unofficially). People like Roger Lucey, Bill Knight, Edi Niederlander and dozens of others. Times have changed, but they basically missed their chance because of it.