I daresay both happened. you can imagine that SOE operators who travelled or relocated would try to disguise their fist, to frustrate kraut intelligence efforts. At other times, an unexpected fist change would cause concern to the home side.
He is sending with his left hand almost behind his back at about 22 wpm (I could manage to take about 18 at the time, though it wasn't my trade, so was able to give a pretty good guess). Under normal conditions, as long as the op at the other end could handle it, as Morse definitely 'takes two to tango' he could do 32. All the ops were good because of the fact that unlike most TG Ops, it was the 'day job', but this guy was a natural.
As a bunting, my Morse was never going to be much faster than ten wpm. You can't work a ten inch projector too much faster than that.
When one of the ROSM's at DRAKE came into our classroom one day where us babies were listening to Morse tapes, he said:
' God I thought it was sonar'
true dit dat.
Our CPO RS was also a radio ham in his private life ( Ginger Jones) and he had one of those twitcher keys. He could send at around 30 wpm - but as you said, it takes two to tango. No damn use if the guy at the other end can't read it.
QSL card derived its name from the Q code "QSL". A Q code message can stand for a statement or a question (when the code is followed by a question mark). In this case, 'QSL?' (note the question mark) means "Do you confirm receipt of my transmission?" while 'QSL' (without a question mark) means "I confirm receipt of your transmission.".
I was knocking out 20wpm+ send and receive quite easily back in 1972 in training at Harrogate. Unfortunately, I fractured my primary wrist in 4th term (slipped on some ice) and was never the same standard again, although I managed to pass out as a fully fledged RTG in summer 73.
Didn't use it much at all (apart from on my Class 1 course) and have never really felt the urge to give it another go for decades.
I reckon I'll try out one of those sites linked in the thread - it must be good for the aging grey matter!
Usually the most inconvenient, like 20 miles. Too short for skywave, too long for ground. Have worked Scotland-Cyprus with only 20-30 mins down time per day for freq/crypto changes and Bulford-Nairobi but that sort of fun was unusual for any unit I was with.