Do application updates boost sales?

I've always been a firm believer in releasing finished code. But alas, I've learned a new iTunes App Store lesson today. It turns out releasing updates helps get your application attention and sales. It makes sense really. Once your application is installed on someone's phone you have a slice of real estate. The App Store will bring the application back into people's minds when an update is published.

So here's to all those people releasing half finished applications and updating every couple of days! Well, and those applications like Labyrinth, Fuzzle, Eat Bunny Eat, and Where To that seem to be milking the update to ranking boost trick for all its worth!