Yes Wyred 4 Sound has always been Class D amplifiers. They use the same output stages as Bel Canto and Jeff Rowland amplifiers, the B&O ICEPower. The input section and layout are customized by EJ and crew, from my understanding. I have read some very good reviews including 6moons and The Absolute Sound (which gave them an Editor's Choice Award).
Got some serious comparisons to do after getting a reasonable burn in
....