"In today's increasingly competitive world, we find only short gymnasts in the top tier."
That is less true now than it was 10 years ago. Nastia Liukin and Svetlana Khorkina are both of above-average height (5'4" and 5'5", respectively), as is Sandra Izbasa (5'5"), the reigning Olympic gold medalist on floor. You still see some very short gymnasts (eg. Shawn Johnson or the Chinese), but tall women can actually be competitive now.
That is less true now than it was 10 years ago. Nastia Liukin and Svetlana Khorkina are both of above-average height (5'4" and 5'5", respectively), as is Sandra Izbasa (5'5"), the reigning Olympic gold medalist on floor. You still see some very short gymnasts (eg. Shawn Johnson or the Chinese), but tall women can actually be competitive now.