This was a big surprise. I drank the 2003 Yering Station Shiraz/Viognier Reserve a day after the Cullen, and wow! it tasted very similar. This wine was a little bigger, displayed more dark plum, but aromatics, helped by the Viognier, mouthfeel and elegance were comparable. The tannins of the Yering Station are a bit firmer and I am rating this wine a point less, as the finish is not quite as polished.
I drank this wine relatively soon after release and did not like it much then. However now, the different elements have integrated well resulting in an excellent wine.