Global IPv6 (IANA -> RIR) policy question

[Apologies for duplicates]


IANA has been asked to provide input to ICANN's board on the RIR-consensus global IPv6 allocation policy (see for details), so I'm looking to understand what folks in the operational community think.

One question would be the choice of /12 as the minimum allocation size for IANA to allocate IPv6 addresses to the RIRs. Do folks consider this:

a) just right
b) too little
c) too much
d) why are you annoying me with this?

Another question: does your answer change with changes to either a more conservative HD ratio or a longer minimum end user prefix length?