I couldn't believe it until I saw the pop up for myself. Great job Apple! Now, please also remove past reviews posted by people who did not purchase the application. If you don't want to remove, then at least mark them with an "*" and recalculate the 5-star rating based only on people who purchased the app. This should also reduce the number of fake 5-star reviews from the few developers who engage in this practice.
One more request. Please provide the date of the review, the app version the person purchased, and the price they originally paid. Give me the option to only see reviews (and a 5-star rating) from people who actually paid $ for the app. If you don't want to reset the download counter for the free-to-paid apps, at least let me quickly find out how many reviewers paid for the app.