Follow the link in the article to the McKinsey report, it’s a highly worthwhile read. I think the last comment sums of the net effect of McKinsey’s observations and how nascent the market is, especially for cloud services:
But IBM said it is seeing many customers adopt a mix of public and private cloud models to reduce the cost of supporting specific applications such as business resiliency, information protection and collaboration services.
Thinning Clouds? Report Questions Value Of Cloud Computing – Software – IT Channel News by CRN