This is part 2 in image search comparion. Here are the details.

Term: "Monterey"

Total results: 558,000 images (google)
779,000 images (yahoo)

first page: 18 images (google)
20 images (Yahoo)

Irrelevant results on first page: 8 (Google)
1-2* (yahoo)

Explanation of irrelevant results:

Google: Here is the link http://images.google.com/images?svnum=10&um=1&hl=en&q=Monterey
As you can see from the results, 8 were of that of maps in jpg format. Something I was not looking for. (Isn't it obvious? I would be scouring through google maps if I needed maps of Monterey)

Yahoo: Here is the link http://images.search.yahoo.com/search/images;_ylt=A0Je5x8DK5hGOQkAikeJzbkF?p=... As you can see from the results, 1-2 might be called out as irrelevant.

Verdict: Yahoo wins outright. It returned more relevant results on the first page than google.