Vkontakt does not work again IPv6

Less than two months after my post about the work of ipv6 in Vkontakte, as it does not work again.


# time curl -6 vk.com

 <skip>
 </ html> 

0.000u 0.009s 1: 33.00 0.0% 0 + 0k 5 + 0io 0pf + 0w

# time curl -4 vk.com

 <skip>
 </ html> 

0.000u 0.006s 0: 00.18 0.0% 0 + 0k 0 + 0io 0pf + 0w
')
What is this preliminary pause in 90 seconds?
Do you have problems with ipv6 balancer?

Upd. Time dropped to 7 seconds.
# time curl -6 vk.com

 <skip>
 </ html> 

0.000u 0.010s 0.07.26 0.1% 132 + 2048k 8 + 0io 0pf + 0w