I don't know of any resource of ranking information, so you would need to have collected the data beforehand. That being said, I've been collecting data on some queries that showed a lot of eHow results, and I suspect something related to knife sharpening may have been on my list (but I'll have to double check.) Data is stored locally at my office; I'll post a quick update here tomorrow if I have something interesting.
The results may be directly measured but they are not real time. Click on the 7 Day view and you can see that the latest numbers are from Feb 22, before the change was rolled out. You would have to wait until Sunday or Monday, I would think, before seeing the difference.
