Everyone is biased by everything they know - not just by their gear.
Are reviewers biased towards equipment they own?
In the Metronome kalista review@ 6moons, the Danish Husband and Wife review team, preferred the French player over the Linn CD12 and the Zanden 2000P. Linnman(another 6moons reviewer who owns the Zanden combo), obviously(?), prefers the his own equipment. Whaddaya think?