Double-tap to open iPad Apps?

[EricAndy]

There is an image with the Voice Over paragraph in the accessibility section of the Apple site. In the speech bubbles the Voice Over is saying to double tap an icon to open the application. Anyone know why this might be? It would be kind of annoying if that were the case. The only thing I can think of, is double tapping might bring to the section within the pp with new content. Such as the downloads section of the App Store app.
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[Night Spring]

There is an image with the Voice Over paragraph in the accessibility section of the Apple site. In the speech bubbles the Voice Over is saying to double tap an icon to open the application. Anyone know why this might be?

Because when Voice Over is on, single tapping an icon makes Voice Over say the name of the app out loud.