Maybe it is hard to guess what a girl's final height will be. I think some of these teams are paired up when they are children, so I am thinking that there might be an unexpected growth spurt after the pair is already set.
I agree that the pressure to maintain a weight under 100 pounds is producing skaters that sometimes look skeletally thin. It's one thing for Tara Lipinski and Kristi Yamaguchi, at barely 5 feet, to be this size, but these taller gilrs look like they need more meat on their bones for good health.
About muscular men, of course all men pairs skaters must have incredible strength and balance to do what they do. But to me skaters like David Pelletier, Anton Sikharulidze and Hongbo Zhao don't look like musclemen and body builders, the way Hao Zhang does. Lloyd Eisler is another skater who, to me, looks the part of a big, strong guy.
Mathman