AAAAAAND furthermore, in a purely technical sense IPv6 should be faster than IPv4 connectivity when it comes to routing.
Current IPv4 implementations actually do two state table tracking. Both the NAT table and the firewall's state table. In a dual stack, native configuration; only the firewall state table is required for IPv6 traffic alone; with no NAT table required. Or, in some cases, minimal NAT tables for specific devices when you wish to deploy IPv6 only and are supporting legacy devices that do not support it.
So, in theory, routing performance should be edged up a bit in IPv6 land. Also including the fact that hosts are now doing traffic fragmentation and the router's only involvement in fragmentation is sending an ICMP response (PACKET-TOO-BIG) rather than queuing and fragmenting traffic itself. Router performance should ultimately go up by quite a bit.