I don't know about the eq but the pre is a bad ass mofo to track vocals on! I would think it was better than a mackie but it would also depend on your listening enviroment, monitors and a lot of other factors. Maybe you don't like it and another eq would be suited for what you do... I see no problem with that. Myself I'm a big API fan when it comes to tracking instruments and compression and given the choice i like my whole instrument chains to be API 512c with a API 2500 especially on my drum buss and my vocals to be great river or neve with a la2a.
I don't see a problem with him not liking it maybe it just doesn't work for what he wants. oh well