Perhaps Newbrook is thinking of Sam Telig's quasi review of the new Cambridge 650C? He actually was complementary of it given the asking price. I do not recall any reviews of the 840C in Stereophile. Sam Telig mentions it in his review of the Cambridge Audio DacMagic, but incorrectly states that the 840C shares Wolfson DACs with their DacMagic and 740C player. the 840C actually uses higher end Analog Devices DACs.
Absolute Sound on the other hand is quite fond of the 840C, giving it rave reviews and a best buy nod.