While watching the JGP I often wonder how many of these talented young skaters will actually make it in the seniors.
Junior world champs that later won world or Olympic title later at the senior level are not many, when you consider that they too compete every year.
Kulik (OGM only; no world title)
Kristi Yamaguchi (she won the pairs but not sure if she won singles as a junior)
Yu na kim
Midori Ito (did she win a junior world title?)
Savchenko with another partner
Kostomorov with another partner