Robotic arms can move at high speeds. They can be quite unnerving for humans though. Disney Researchers have discovered that slowing robots down can make them feel more normal to humans. As they explain:
The system has the appearance of a robot character, with a bear-like head and a soft anthropomorphic hand and uses Bezier curves to achieve smooth minimum-jerk motions. Fast timing is enabled by low latency motion capture and real-time trajectory generation: the robot initially moves towards an expected handover location and the trajectory is updated on-the-fly to converge smoothly to the actual handover location.
The above video shows this robot in action. As the system shows, humans like human-level timing from robots. More info is available here.