Could this be the saddest ever PPRuNe thread?
There was one about the vital importance of explaining to ATC that you were in a PA-28R rather than a plain-vanilla PA-28.
"G-CD, traffic is a PA28..."
"NEGATIVE, G-IT is a PA28RRRRR"
"Roger, G-IT, hold at SODOF..."
And as for the PA-28RT drivers...