I agree that the 80/20 rule probably applies to this situation. Novice users (a larger percentage of Bing/Yahoo users) have more simple queries and are more li

I agree that the 80/20 rule probably applies to this situation. Novice users (a larger percentage of Bing/Yahoo users) have more simple queries and are more likely to click poor results. Tech Savvy users (which Google owns the lion's share of) will have more queries, more complex queries, will have a better sense of their goal in mind and will iterate queries, and are more likely to leverage search features like definition and calculator queries.