Paul,
New allocations are (as of 1466bis) being done through providers, on CIDRized lines. Whether IPv4 or IPv6, new allocations are not going to badly impact the core routing table size.
Does that mean that all the internet registries no longer allocate /24 (or longer) prefixes that have nothing to do with the actual Internet topology (these prefixes aka "portable addresses") ? Perhaps folks from various Internet registries would be able to answer this question.
I've seen no evidence that IPv6 addresses will be allocated on anything other than CIDR lines. There are crackpots who think otherwise, but there are alwa ys crackpots.
Current IPv6 address allocation documents *explicitly* allow for non-provider based allocations. What makes you to think that such allocations would *not* be used.
CIDR works.
CIDR works as long as addresses are assigned in a topologically significant fashion. And this precondition is crucial. Yakov.