Well let's say the V2 shocks seem to be much less of an emulsion shock than the V1... there's a tiny bit of air in the V2 shocks to allow the shock to extend the first few times (sucked via the o-ring as Gayo pointed out) indeed, but there's quite a vacuum in them really (zero rebound or close) as opposed to V1 shocks which would be real emulsion shocks with a lot of air in to prevent any hydra-lock... the snap ring would just pop off otherwise anyway!
V2 shocks all the way baby!
Paul