Surfers would say it does but they only believe it does because it feels like it does. No one has ever taken a radar gun out to test it. Pumping for speed is where you move up and down the wave face to try and increase your speed parallel to the wave. The belief is that you will gain a higher maximum speed quicker by doing this than simply riding the wave normally. But I am unsure of whether this is actually mathematically possible. The example scenario i am choosing is a wave with a perfectly circular form (looking at it from the side you will see 1/4 of a circle). The wave also moves at a constant speed and is perfectly uniform with no break. After x amount of time both scenarios will end with the surfer having a final position on the same part of the wave with the same heading.