I think that higher level gymnasts tend to be shorter, because training longer somehow affects when you hit your growth spurt(I'm not exactly sure about this, but I've heard stories similar to it). My first year on team was when I was 11, and before that I barely was training more than once a week. I hit my growth spurt a little bit late, sometime between 7th and 8th grade, and I grew A LOT. I was about 4'11" at the beginning of 7th grade and now as a high school freshman, I'm 5'4" and the second tallest person on my club team. That's just what I think, but it sounds like that's what happens.