Non-Free-Fall Motion and Newton's Second Law of Motion
At this point, the man is falling quickly enough that the wind resistance is equal in size to the force due to gravity acting on him.
Now, the man is falling so quickly that the wind resistance acting on him is the same size as the gravity acting on him. Because the two forces are equal in size, they cancel each other out completely. Thus, there is zero net force acting on the man, and as a result, his acceleration is zero. If his acceleration is zero, does it also mean that his speed is zero?