Historically, drawing have always fallen into the categories of quick studies and finished drawings, but history seldom tells us how long each artist actually took to accomplish the drawing. Rembrandt, clearly, had a wonderful ability to draw fast and evocatively; his pen and ink drawings have a breathless immediacy on occasions, blots, drying pens, scribbles and everything in between. His drawing of Jesus and the Adulteress is spare and fast, as if he was thinking, planning, organising. Other drawings evoke a spur-of-the-moment view as he sees someone asleep or sitting in a moment of introspection, a moment that he wants to remember, a scene that he wants to record for the pure joy of drawing. Spare and elegant, his lines are fast and fluid.
Granted, the medium somewhat dictates the speed at which an artist draws. Pen and ink, conte, graphite or charcoal are all relatively fast, and marks can be made expressively with quick results. When you get to silverpoint, things tend to slow down a lot. The time available to make a drawing is therefore important, and subject matter tends often to dictate the medium... if the scene is about to disappear, you chose a quicker, more impressionistic way of capturing it. Each artist also has an individual eye, chosing what is important to record. Some aim mainly to capture the essence of the subject; others get fascinated by the play of light, the spatial composition or other aspects which are more time-consuming to depict. Adolph Menzel, for instance, often used a wonderful technique of drawing a person doing something from multiple poses on the same page. In a way, he was a forerunner to William Kentridge, with his many images being drawn, erased, filmed and then refilmed after changes. Menzel was drawing fast, fluently - he was a master draughtman. Kentridge is a superlative draughtsman too, but his approach, innovative and very much of our era with its mix of media, tends ultimately to be a slow and meticulous process, as each drawing evolves, is recorded and then evolves again until its final concluding version in narrative.
Lots of approaches to drawing - mercifully! It means that each of us can be a tortoise or a hare in our drawing methods. The results are really what count.