Developers depend on App Store ratings for the success of their applications. When updates are made to App Stores, it can really throw off development teams. The iOS 6 update has caused a panic about changes to the Apple App Store, with many dev teams claiming that the updated App Store rates apps differently.
An article by Darrell Etherington in TechCrunch explains that it is not the app store rankings that have changed, but rather the app store functions like Search, etc.:
“….the evidence actually points to there being no or minimal changes to the actual algorithm governing rankings, and instead any changes are due more to other shifts, like the way search works and how the top charts are set up.
‘If the algorithm had indeed been changed to a system based on anything other than the velocity of downloads, the repercussions would have been obvious and fast,’ he explained in an email. ‘If the algorithm were based purely on sessions then Facebook would not be dislodged. We can already see that a good amount of apps are resuming their positions after the initial drop in rank. So the message is simple, carry on as normal and understand as best you can the App Store dynamics.’