I’ll be posting more numbers next week, but I just received a search engine breakdown update for Feb 1-13. I’m looking at the data, and I’m noticing a strong shift in Ask’s and Yahoo’s marketshares since December 20.

In January, I posted breakdowns from the December time period, and had noted changes to Yahoo starting on December 20. The trends have continued. The rate of change has flattened, but Yahoo’s held on, and continue to gain.

Yahoo’s growth has been more dramatic in the U.S , than elsewhere; it may be the result of various factors; interface changes (for the first time in years, I find Yahoo’s interface appealing), better distribution, or a combination of factors.

Send us your feedback, and comments on changes you’ve noticed.