I struggled to get my radio technique up to scratch while doing my PPL. I was flying with my instructor and he was tuning me into various ATC establishments and making me practice pasing messages to 'real people' - not busy stations however. Anyway I heard one aircraft and station have a pefect exchange of information - the exchange was crisp, the information flowed at a good rate, in the right order and was completed efficiently and very little 'er, erring' in the messages. After they'd finished I turned to my instructor and said, slightly patronisingly, "ooo didn't he do that well" - with my thumb on the PPT. Change frequencey, move on...