But in a low volume market like the Mac App Store it takes anywhere from a few weeks to months to get 5 reviews after an update. (Or even years in non US stores).
I made the experience that updating a well reviewed Mac app leads to a drop in sales until you get back to at least 5 ratings. (You need at least 5 ratings to display the average rating in search results and category lists in the Mac App Store).
This is a big incentive to keep updates back until it is really necessary to release them.
