Where did you get that information? Google still says that its at $50. https://www.google.com/adsense/support/bin/answer.py?answer=21233&topic=8455
Thats an interesting news. Though no supportive information is getting with that news. If google change anything of their rules they may notice to their users and publish to their sites.Anyway from where did u get that information.
this month google is later than before to post the PIN notice when someone adsense account's payment reach 50$. so i think that "udit1425" was late to get his PIN notice while his payment having reached 80$. then he got the wrong info.
I think its still $50, but it does not necessarily mean that the PIN will be sent rightaway so earnings might add up in the mean time.