If you agree that (1) Bing actually produces good or even better-than-Google results and (2) it's susceptible to easy tricks, it means that Bing is kind of flanking Google. Google sets the standard, so no one tries the easy tricks b/c Google will penalize them. But the algorithms that made the easy tricks appealing is actually really useful (unless it gets spammed, which is why Google dropped them). Now folks don't use those tricks as much b/c of Google, and Bing reaps the rewards.