I would figured it the other way round. For me it seems that the mousers are the people that do not really learn what they are working with, and only click by rote. Those that know how to operate by keyboard on the other hand also know the software, as they had to discover the shortcuts somehow.
Also true. The shortcut skilled people were then followed by people how could make their own shortcuts. At the end were those who thought themselves simple macros to automate things.
