Tufte's ideas are good for presenting simple information. He gets many things right (eg if the visualisation doesn't work in black and white, adding colour won't fix it). However, many in the infovis community are outright sceptical, if not dismissive of his ideas for analysing high dimensional datasets.
Where his ideas really work is once you have "the answer" that you want to present to someone else. However, the basic exploration of the data to find interesting keypoints, is not what he specialises in. There's whole communities devoted to techniques for datamining and presentation, principly infovis/Visual Analytics.