TidBITS just published an article discussing how App Store Reviews Now Distinguish Versions. A recommended read.

I was quoted for this article. My full comment was:

I think that is a most welcome enhancement. Often, reviews mention deficiencies that are addressed in subsequent versions, but without a version number (and to a lesser extent, a date), potential customers have no real way of knowing if that comment is still relevant. For example, for my SmileDial Pro app, I had two reviews for version 1.0 saying it was a little slow to navigate, so I addressed that in version 1.1. Now, it is clear that those issues were with an older version.

(You can check out SmileDial via its product page.)