There was definitely extreme tiger-parenting in my town - and so many examples of "burnouts" by kids that other parents would say "oh, he was so smart - he was destined for great things, what happened?".
It is not LOG - I feel it is a combination of the environment AND the person's temperament more than LOG for burn out.
It's LOG plus the issue of temperament with respect to psychological resilience, and the use coping skills.
Meaning that the LOG/intensity makes the risk of this kind of burnout possible (not probable).
