If you’ve shopped for Kindle e-books recently on Amazon.com or Amazon.co.uk, you may have noticed some changes to the way that search results are displayed.

Or maybe not. Not all shoppers have been affected.

Apparently, Amazon is testing something out with many customers, but not all customers. That would make sense, actually. Then Amazon would have data for two groups: a control group, shopping like normal, and an experimental group, experiencing the changes.

What’s going on?

This doesn’t apply to everybody. Many customers are observing the following:

The review tally and average star rating are not showing up next to Kindle e-books in search results for many (but not all) customers.

Just to be clear:

• Reviews are showing, but only on the product page. Normally, you see the total number of reviews and average star rating before reaching the product page, but for those who are experiencing the change, you…