Well, 1.4x faster is a bit of an odd metric. I presume that means that connection set up times measured were on average
1/1.4 times as long for IPv6 as they were for IPv4, but there are other possible interpretations.
So really, that’s a convoluted way of saying it takes 29% less time to set up an IPv6 connection than an IPv4 connection on average.
I can believe that is likely in a scenario where one is dealing with IPv4 NAT overhead.
Why isn't this just inconsistent paths between V6 and V4/nat? (Divergent topologies)
At least in most of my real world experience, they don’t tend to diverge all that much.
Further, post-initiation performance seems to be largely on par v4<->v6 and without NAT, I see faster
v4 connection startup times. V6 appears to still have a slight advantage, but it’s more like 5-10% than
30%.
Owen