OK, which is it?
QUOTE
"It is going to try a DNS lookup for the IPv6 address and then a DNS lookup for the IPv4 address," Mockapetris said. "It just uses more DNS, and until we increase the supply, things are going to go slower."
or
QUOTE
when a machine does do an IPv6 query, it will do so only to a DNS server that responded to its initial IPv4 query, the company said.