This is a sure sign that the Tibetans are losing faith in the leadership. Even those considered close to HHDL and his entourage are seeking for refuge with China. As they see His Holiness get older and the shameful performance of the CTA leaders like Penpa Tsering and Sikyong Lobsang Sangye, people are making choices that are more beneficial in the long term.
Under Chinese leadership, TAR has improved education system and improved literacy rate, better infrastructure, better security etc. In the meantime, Tibetans in exile are fighting against each other more and more, they still live in poor conditions, many still cannot access quality education, do not possess an official travel documentation (a yellow pass book is not a proper travel document). They do not even have a place they can call home.
This is a blinding contrast between the Chinese leadership and that of Tibet's. Anyone who has the opportunity would do the same. We can only expect more and more modern, educated and exposed Tibetans to go home to China soon.