Persistentone, the projections from the minister's office show otherwise according to slide 4 in this preso from 7 July '11:
http://www.stocknessmonster.com/news-item?S=NWE&E=ASX&N=548204
You'll note they have factored in Gorgon, Pluto, Macedon, Devils Creek, Wheatstone and 'tight gas' (quite a bit) but there's still a healthy, and increasing, shortfall in supply out to 2020.