Indeed, my initial recording attempts with Jing contained frequent hesitations or misstarts, and I had to experiment with various means of editing students' drafts before developing a sense of which tools worked best for specific types of comments (e.g., over time I have increasingly chosen to use the TEXT HIGHLIGHT tool when reading Word documents to draw students' attention to textual elements in their texts).
Overall, in the past four years while using the above techniques, my ability to record comments while minimizing hesitations, awkward pauses, and misstarts has improved.