Is it really Ask.com that put up this site, or just one smart marketer ?
I know exactly what they are talking about. I did the same thing. My favorite search engine is google. There are keywords I'm searching for on a monthly basis, but the results hardly change, so you get to the same results time after time. So, I noticed this and tried different search engines, and guess what. New results and new business oppurtunities.
I would recommend everyone to try different search engines because this can expand your business as well. You will find new sites and oppurtunities, you meet new people at forums you would not have found through (for example) google.