We didn’t want the document to contain a lot of text describing what application virtualization is, all the ins and outs of every product in the chart and the complete test-setup and how the tests were performed. We wanted the document to be as short as possible, easy to understand the differences between the solutions and a quick overview what the differences are in launch-times. To get fair results for the launch-times, we took the system requirements of each product into consideration and we made sure that the tests were performed under the same circumstances and that each system got enough resources available.

Source: http://virtualfuture.info/2009/09/application-virtualization-comparison-chart-september-2009/