I learned to touch type 45 years ago and back then I could easily find the little bumps on the home keys. Now it's not as easy and if I'm in the dark I can sail along nicely until I move my hand away for some reason[coffee: cookie: wipe sleep from the eyes]. Then I need to steal a look to find the home keys because I can't so easily find the bumps on the newer keyboards.[They really are there though.]
As for the single and double quotes I have found either way easy to read, but no quotes has me stumped. Now that I understand the differences in keyboards I can see where the UK might tend to guide the writer to use singles where the US guides for doubles. The US keyboard has single and double on the same key and you have to shift to do singles. The key being just to the right of the right 'pinky' finger.