You mean as in "Turn left
heading ..." etc. You will notice the word 'radar' is conspicuous by it's absence. It is not there, for good reason........it is totally superfluous.
When I was training, I used to whacked over the back of the head for using superfluous R/T, such as 'radar heading', 'from present position' etc.
Standardisation is meant to keep these sort of things from springing up and becoming common parlance.
Foghorn; All this confusion seems to be arising precisely
because the term 'radar heading' is being used. If the (correct) term 'heading' was used, nobody would (should?) be confused by headings and tracks. So, maybe you were correct in challenging Genghis' statement, if there is a perception out there that 'true track' somehow comes into it, but don't provide incorrect gen. You know what it's like with the flying types- gotta speak slowly and keep it as simple as poss.