In Terminal, enter defaults write com.apple.appstore ShowDebugMenu 1. Quit and re-open the App Store app and you get a bunch of Debug options.
If you set the "Flying icon animation duration" to 0, the icon just fades in place into the Dock, which is kind of nice.


If you set the "Flying icon animation duration" to 0, the icon just fades in place into the Dock, which is kind of nice.