It's the particular word to describe the color. "Gold" has always been seen as the symbol of tasteless opulence. If it was called only as "champagne" the reaction probably would've been a bit different.
Also Macrumor has always been the place to complain about these things. Macrumors wasn't around when Apple introduced the candy color iMacs if it existed I can only imagine the level of apocalyptic tone the hypothetical news thread would have taken. As a reference, check out
this iPod thread from 2001 and how much people hated it. A colorful iMac line up would've gathered so much more anger that everyone would've been very sure of the "toy Macs" putting the nail in the coffin for Apple.