I don't see a resemblance? Is any app that tracks multiple packages a knock-off? I don't think so. And I've been using original Delivery Status (as an OSX widget) before there even was App Store.
http://android-apps.com/images/pname/eu.zomtec.android.deliv...
and this:
http://junecloud.com/images/entries/20101010_6613.png
... you see nothing in common? It's difficult to take your assertion seriously.
Parcels colors it's bars seemingly randomly to differentiate between them and uses some off the shelf icons for different package statuses.
Where the fuck do you see the resemblance? Only in the fact that it puts different packages into different bars and colors them differently? Should it display a Cover Flow for packages or something to differentiate itself?
Anyway, I like Delivery Status more myself, but accusing Parcels of plagiarism is idiotic.