Like Way says folders wouldnt be put in the built for speed catergory. although if you become very familar with a particular cameras operation, things become second nature which both speeds up operation and is less anoying because you dont need to think about each seperate thing to do.
goes without saying a coupled rangefinder speeds things up considerably.
i can only think of one folder of the top of my head that cocks the shutter while winding on but it doesnt have c/rangefinder, so you may as well say that all need to manually cock the shutter. film winding is another aspect that can speed things up and camera like the s/isolette, s/ikonta, s/baldax...the list goes on but pretty much any late 50s camera.
the film wind isnt that difficult to be used to on just a manual red window camera such as the welta weltur though. once you become ascustomed to it is fast. after each shot without looking, wind a couple of turns and when your ready to shoot next wind a short distance until the number appears, in some ways it can be quicker, less distance (time) to wind on, loading can be simpler and quicker, and on some of the more tempermental auto wind on, frame counting-stop cameras the mechanisms can play up.
setting the exposure speed and aperature is the next thing that can take some time, and the super isolette has the LV system which can speed things up if you are used to using it. one thing i find a pain with the super isolette is having to set the focus to infinity each time before closing (wont close otherwise) whereas the Weltur returns to infinity automatically as the door closes, just a small thing but makes it quick and easy to close. the viewfinder is just as good as the s/isolette, there are only a couple of late model folders that have better and they are scarce and expensive. if you get the right size (shape) filter it can be left on the weltur (when you close the front) which speeds things up and is a bonus as well.
