Realize this thread hasn't been updated in a while, and figured I'd share some of what I've found regarding the use of gold-plated vs tin-plated terminals, since I've seen a lot of inconsistent info regarding that, including in this forum (and needed the info for my own build)
Summing up what I've found, it seems the viability of using one or the other in your cabling connections could depend on how many times those connections are made over the course of their use (e.g., life cycle), and whether or not those connections are subject to excessive vibration (e.g., fan, pump, lack of strain relief, etc.). Toss in the propensity of some enthusiasts to change out things regularly, and durability might become questionable (there are cabling related posts by people in the forum which may be related to that).
Of special interest are fretting and fretting corrosion, which the referenced docs I linked to explain fairly clearly, albeit briefly.
All in all, I think the issue boils down to one of a matter of YMMV more than anything else; which could be dependent on your particular use case example, and just how much of a concern something like matched material is in your electrical conductors. Sort of like the question of to cap (or not) any cables you build yourself.
Remember the 901
. Edited 05/16/17: it's possible this link may now be dead. Essentially, it linked to an older USAF document that broke out all the codes associated with how man hour time was tracked on work orders. "901" referred to a generally used descriptive catch-all where intermittent issues were experienced, often leading to fixes like "remove and replaced unit, ops check good," or simply ops or bench checked good," no problems noted. "901s" could be and were problematic, especially if they were repeat issues, forcing technicians to change something (e.g., anything) just to say that they did as a process of elimination, usually at the request of higher ups.
Summed up, IOW: If you can't find an issue when you're troubleshooting a complaint, you won't know what to fix.
The rule of thumb used to be mating pins should be plated using the same materials if you want avoid problems. See Golden Rule No.12 : Gold Contacts Should Not Be Mated To Tin Contacts
in this linked AMP Technical Report
. While the doc is somewhat older, its principles should be more or less still applicable.
Also see: TE brief on reliability in general and for electrical connectors in particular