[TenTec] First dit shortening

[Ken Brown]

I am curious. Why does a rig, that is one of the best for QSK, shorten 
the first dit. If it can switch from receiving to transmitting and back 
for every dit and dah, what is different about the first dit or dah. Why 
isn't the end of transmit delayed an equal amount of time as is 
necessary for the delay of beginning of transmit, and why is it 
different on the first dit?