It's all "Grade A" at Crown Maple in Ralph Gardner Jr.'s feature of Crown Maple in The Wall Street Journal:
Light, Dark—All Maple Syrup Is Delish
I don’t know if you’ve been following the news lately—the maple syrup news, that is—but the grading system for this brown, or rather medium amber, nectar from the sap of the sugar maple has changed.
In fact, medium amber no longer exists. Neither does light amber, dark amber or USDA Grade B.
As of January, the guidelines changed. The liquid is now rated according to color rather than grade—from golden to very dark.