Yahoo Data Center Variation

Seeing dramatic variation in Yahoo search results

[jeffsmith]

One of my coworkers and I are seeing dramatically different results when we conduct the same searches on Yahoo. As an example I will see one of our sites in the top 5 for a search and when my coworker does the same query, that same site is not in the top 10.

I assume we are hitting different data centers even though we are in the same building about 15 feet away from each other.

Does anyone have any experience with this or an explanation for this? It seems like Google's data center variation isn't quite so dramatic, or at least I haven't witnessed that.