I've downloaded Sparrow on my iPhone and used it for a bit but then later switched back to the native email app, primarily because of the lack of push notificat

I've downloaded Sparrow on my iPhone and used it for a bit but then later switched back to the native email app, primarily because of the lack of push notification at the time of its initial release. I wonder how much of this sale has to do with the updates to email in ios6, such as the ability to attach photos directly from the mail app. Can they differentiate enough to continue to keep an active user base? if not its hard to beat a native app. Can't comment on the Mac, haven't tried it.