From the article:
"Our rush defense was better [against Oakland], Coyle said, "and hopefully, as we get some of our people back in the lineup, that will continue to improve as well. . I think there is a lot of room to be optimistic that, if we can pull it all together, we've got a chance to be solid on defense."
The Dolphins' defense produced four turnovers (three interceptions, recovered fumble) and two sacks against Oakland. They think they're ready to hit their stride, and Rodgers will be a good measuring stick.
In absolutely no way does playing good defense against a terrible Raiders team mean they will play well against Rodgers.
Also from the article:
The list of quarterbacks the Dolphins have beaten is impressive. It includes Indianapolis' Andrew Luck, Atlanta's Matt Ryan, Cincinnati's Andy Dalton, San Diego's Philip Rivers, Pittsburgh's Ben Roethlisberger, and New England's Tom Brady (twice).
Those are some good quarterbacks, but none are currently on Rodgers level. Luck probably will be some day and Brady has been, but currently Rodgers stands above that whole list.
This article has some pretty poor reasoning.