It's very misleading indeed. And regardless of what has grown the most lately, the top industry in the US by far is Finance (19% of GDP) followed by Government and Manufacturing (12% each). 'Tech' is scattered across various industries, I think for the most part is included in Business Services and in Information. It's simply not nearly as important as some seem to think it is. The data is available here http://www.bea.gov/regional/index.htm