When did the GM become Evil Incarnate?

Interesting thread on rpg.net at the moment, critiquing the attitude of Luke Crane in The Burning Wheel as 'anti-GM'. This is based on the premise within that game that the players can, and indeed, are encouraged, to have more power at the table than in so-called 'traditional' rpgs. The roleplaying game adage that 'The GM is God' is, apparently, fundamentally challenged and there are a number of