Aye, the attitude to AGW has changed, and for two reasons IMO:
1) Deniers have run out of alternative scenarios, such as undersea volcanoes, solar cycles, Milankovitch cycles etc. cannot possibly account for the current rate of warming, and making daft claims about carbonic acid not causing oceanic acidification have all turned out to be damp squibs. Quelle surprise!
2) Said Deniers have now turned the dark arts toward influencing government policy. After all being demonstrably out of their depth, when it comes to science, hardly benefits their cause. . .