Wikipedia says: "Copper is the most common material for electrical wiring (silver is the best but expensive), and gold for high-quality surface-to-surface contacts." According to a chart on the electrical conductivity page, it looks like gold, while and excellent conductor, falls just after silver and then copper. But you can get very high quality surface contact with it, even though it's conduction is somewhat less effective. So it looks like the comic fails, but at least they put some effort into it. It's silver that's a better conductor but too expensive, even though gold's still a damn good conductor. Yep. Nice try, but the research fails.