By James Bacon: 8squared, the 2013 Eastercon Bid, announced they would be going for panel [gender] parity. Simon Bradshaw in charge of programme also advocated avoiding having all/majority moderators being male while achieving this.
Meanwhile Satellite, the 2014 Eastercon bid, said they would prefer to follow what they normally do, so if four women are the best speakers they’d be on the panel. After reviewing previous Satellites (local cons) they did well previously. When pressed they said they would not follow panel [gender] parity and one committee member subsequently said they want the best participants regardless of gender. This seemed a popular approach, but passions ran high at this stage from those who see that attitude as failing to enable gender parity.
Both conventions were voted in.
The question of Panel Parity appears alive. One national con, here in the U.K., has embraced it.