Does App Store Updater Download Always All Content?

I've developed an iPhone/iPad application which is 100 Mb. It contains images and static libraries.

Does app stor开发者_如何学编程e is so smart, so when users download new version of application updater will download only changed files?

Thank you.

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App Store Updates:

When an App is updated, the previous version is completely removed from the device, and the updated version is installed in its place. HOWEVER, all the files in: NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); and all the key/value's in [NSUserDefaults standardUserDefaults] persist through the update.

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iOS Updates:

Updates will now only contain the changes - Announced at the 2011 WWDC

Some more articles reporting on it:
apple-shows-ios-5-with-new-notification-system-delta-updates-twitter-integration-and-much-more
ios-5-supports-ota-delta-software-updates
ios-5-over-the-air-update
beta-4-of-ios-5-released-by-apple-over-the-air
ota-everything
ios-5-to-allow-some-ota-updates-through-3g