I'm an intermediate-ish typist (I think?) typing at about 60 WPM, still trying to do typing tests and drills every day to improve. My 'moonshot' goal is 100 WPM, but I think my accuracy actually needs more work than my speed. Coming from a musical background, I feel that technique is critical, but there's one element/action that I haven't found a comprehensive explanation/opinion on as of yet. Specifically, do skilled touch typists press shift first, then the key they want to modify? Or do they strike them at the same time? I've been experimenting with both, and have naively identified a few pros/cons:
When typing them in sequence, there is a reduced chance of hitting the second key before shift is depressed, which helps accuracy. There's also a fairly distinct rhythm involved (for building muscle memory). The downside, for me at least, is that it sort of mentally decouples the action - this isn't such an issue when typing uppercase letters, but I have found it's impeding my ability to develop muscle memory for symbols.
One advantage of striking them at the same time seems to be an (extremely small) increase in speed - there's one less action in the sequence. The other advantage, as mentioned, is that it helps me to associate one physical action with each symbol requiring shift; as opposed to doing it 'syncopated', where I find myself creating an extra 'step' cognitively to achieve that symbol: for a colon
left pinkie on
shift, right pinkie at rest on right home key
pinkie on shift, then type
;, which becomes
:because shift is depressed.
Out of a respect for the strictures of classical typing techniques, as well as a need to avoid creating an opinion based question, I'm looking for the 'doctrinal' answer from the perspective of formal typing training. Has anyone ever been given specific instruction on this, either in a book/application teaching typing, or by an expert teaching a formal touch-typing class?