actually, i really hope that tai tzu ying won WJC title this year. Nozomi in 2013, and Busanan in 2014. it will be so perfect. Now, still sad to realize that Tai Tzu Ying does not have any WJC gold title
If Sindhu have had participated this year, she would have got the gold medal. She is better than all the three girls you mentioned. She beaten all the three girls recently.
1) Tai tzu ying - Got beaten by sindhu in 1st round of Indian Open Superseries.
2)Busanan - Got beaten by Sindhu in semifinals of Asian Badminton Championships 2012
3)Nozomi- Got beaten by Sindhu in Finals of Asian badminton Championships 2012
Sindhu is continuously improving and has beaten even Olympic champion Li xuerui. She is just 17. She has two more years to participate in these championships.




