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Arlie - I had not heard that Google punishes site ranking if a website doesn't use responsive. in fact the official stance is that Google does not favor any particular format "as long as the page(s) and all page assets are accessible to all Googlebot user-agents."

In fact, Google has said that if you offer device-specific functionality, they love it. Perhaps that is one reason big properties like Amazon, Apple  and AutoTrader have gone with adaptive.

But responsive is quicker and cheaper...