Drop in Yahoo traffic, but not in ranking?!?

[helleborine]

I used to receive significant traffic from Yahoo. However, I hardly receive any visitors from Yahoo anymore, but there appears to be an increase of incoming traffic from MSN and Google searches.

Yet, I rank better in Yahoo than in Google!

To illustrate:

Google 80%
MSN 15%
Yahoo less than 5%

Are fewer people using Yahoo these days? Are people switching to MSN?

These are merely observations for my most popular craft website. I wondered if other webmasters have made similar observations - or not.