Google vs Yahoo! vs ...

I decided to run an interesting experiment.

Google search:
1. google - 2,610,000,000 hits
2. microsoft - 1,760,000,000 hits
3. yahoo - 1,410,000,000 hits
4. linux - 1,300,000,000 hits

Yahoo search:
1. yahoo - 897,000,000 hits
2. microsoft - 521,000,000 hits
3. google - 469,000,000 hits
4. linux - 362,000,000 hits

Well, an expected and consistent (bias). However, the following really surprised me:

MSN search:
1. yahoo - 104,416,381 hits
2. linux - 96,223,532 hits
3. microsoft - 83,731,317 hits
4. google - 67,452,682 hits