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I disagree. The size of the typical webpage is growing at faster rate than people are upgrading to faster internet connections. The average webpage is now > 1MB. It matters because adding even a tenth of a second to your load time can cost you in pageviews and revenue.

Fairly typical internet connection in what country? In a major city?

you're right but if you working with a module loader (like require.js or yepnope.js) it affects actually.