Another few days and we should know if the card dates are fact or fiction. If I stay at diamond, the card can be believed, if I drop to gold (as per my earning from 2012 calendar year), so be it.
Well the T&Cs from VA about the hotel partner statuses say that HHonors Diamond is valid for 6 months. So in theory if you requested Diamond in Feb it 'should' be valid through until August in any case; obviously our membership cards aren't reflecting that though.