Imo, height is a huge advantage in WS (doubles as well) and I feel this is supported by data. Only because players like NO, AY and TTY are absolutely exeptional shot makers (add RI and you've probably got the best 4 in world, Steen always says so as well) and top class retrievers, they can compensate for their shortcomings

)). TTY is also already 7 centimeters taller than the other two, and she is significantly better at smashing - she uses it more often, scores more points with it, has more pace.
Since I don't want to make unsubstantiated claims and got curious as well, I looked it up. Turns out the average height of top 20 WS players is 168,5cm. There are only 2 players shorter than 160cm and 14 players are 168cm or taller.
In fact, there are only 4 (5 maybe) players shorter than 160 in the top 50.