Just because they bashed Apple, doesn't mean they're not good.
For the record, I am a Consumer Reports Online subscriber. They are my go-to place for researching major (and minor) purchases.
That being said, the S4 scored an 81, and the 5S scored a 78. It's really not that major of a difference. And if the top phone is only scoring an 81, they must feel that smartphones overall still have a ways to go before getting very high reviews.