The score represents how well optimized the page is for speed, but does NOT measure the actual load time. (The real load time, of course, is what users experience.) So, slow servers or connections or content from other sites (like third party ads or widgets) can kill performance even on a site that gets a great score.

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McQuivey says its software is also optimized to accelerate its page-turning to about three times the speed of the Kindle's.

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And then it's a huge gamble whether the page you'll land on will be useful, interesting, relevant or even mobile-optimized.

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Apps provide fuller, richer experiences that provide more relevant content than a typical Web page, which is not optimized for mobile consumption and often needs further navigation to provide the right information to the user.

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Out of the box, users will have access to an S Pen-optimized version of Flipboard which enables Air View hover functionality and headline previews from the main tile page (up to three, in our experience).

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