I think Impedance matching is most important when your using brute force electrolysis.
When your using Voltage potential Impedance bridging, or voltage bridging is whats important.
Impedance matching is the electronics design practice of setting the output impedance (ZS) of a signal source equal to the input impedance (ZL) of the load to which it is ultimately connected, usually in order to maximize the power transfer and minimize reflections from the load. -wikipedia Impedance matching
Notice it says to maximize power transfer to a load. Power is watts, which is voltage times current!
In electronics, especially audio and sound recording, a high impedance bridging, voltage bridging, or simply bridging connection is one which maximizes transfer of a voltage signal to the load. -wikipedia Impedance bridging (also known as voltage bridging).
Notice is says to maximize transfer of a voltage signal to the load!
More about Impedance (voltage) bridging
A connection is commonly said to be bridged if the load impedance is at least ten times the source impedance
-Wikipedia.
So I think it depends on what your doing, Brute force or voltage potential.
Also look at Naudin's replication, he added resistance for what i think was to get a better voltage bridge, but he didn't match it exactly, because he would have then had too much resistance in his circuit and voltage would have dropped significantly.
