Do taller swimmers have an advantage over shorter swimmers?

Do taller swimmers have an advantage over shorter swimmers? If so, what is it, and how does it work?

To demonstrate 2 swimmers with different heights in this controlled experiment, 2
wooden blocks were used. One had a mass of 143g and a length of 11cm, the other
block had a mass of 235g and a length of 18cm. The blocks were tied to strings which
were tied to weights. A pulley was used to obtain a constant force. The blocks were
placed in a water filled aquarium that was 50cm long. Styrofoam was attached to the
blocks to be the target of the motion detector. When the weights (suspended from
the pulley on the opposite end of the aquarium) were released, the blocks would accelerate
to the end of the aquarium.

Results show that the longer block (18cm) required the same amount of force to get to
the other end as the shorter block (11cm). This proves that objects which are long and thin
have no advantage over objects which are short and thin. However, that statement is true when the objects are of different lengths and masses. If the blocks were of the same mass, different results might be produced. When the weights doubled, the velocity doubled; therefore, Force equals Mass times velocity (F = mv).