is source address binding more valuable for IPv6?

[Ivan Shmakov <oneingray@gmail.com>]

	Do I understand it correctly, that the 6to4 and Teredo tunneling
	transition mechanisms work by establishing ``implicit'' tunnels,
	and, thus, are subject to the already existing IPv4 routing,
	while 6in4 routes the packets via the chosen IPv6 provider?

	Thus, it seems sensible for a single host to always implement
	Teredo or 6to4, even if as an addition to 6in4, in order to
	utilize the existing IPv4 routing.  (Consider, e. g., two
	friends with hosts connected to the network of some IPv4
	provider; the use of 6in4 implies that the traffic will be
	routed via yet another, possibly distant, IPv6, provider, while
	with either Teredo or 6to4, the packets will be routed directly
	via the IPv4 provider's network, resulting in lower latency,
	bandwidth consumption, etc.)

	May it therefore make sense for all the IPv6-compatible network
	software to support source IPv6 binding?

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