The memo reads to me more like "Ok, we've got a new competitor and their new UI makes ours look terrible. We need to step it up and modernize our design".
At the same point, you have to remember that the Samsung UI on android based devices is just that - ANDROID. So you can hardly start calling Samsung out for copying icons when in many of the Samsung builds they are using stock Android icon.
Either way, Apple really DID NOT design a unique, unseen new type of icon. You only have to look at the likes of Palm and even some of the freely available Windows Mobile skins that were around to know that.
The icons have quite simply evolved over time. For an example, look at a screenshot of stock Android 2.3 (gingerbread) on the Nexus S. You'll notice a 3-icon dock with a green phone. The next icon released by google was the same phone and the same green. The only difference was that they made the background of the phone the green color, and the phone symbol was white.
Whilst I do think that Samsung (or more specifically ALL of the 'big boys' running on Android (Samsung, HTC, LG, etc) have taken some heavy influence from the UI of iOS, they have not 'blatantly ripped it off' or stolen anything directly. This goes down the same lines as the Mac VS Windows debate. The natural progression was that better hardware allows for more advanced UI concepts to be used without it causing fundamental UX issues.
The argument is so silly that its got to the point where people are now claiming that ALL phones made after 2007 MUST be a rip off of the iPhone. Some people really need to listen to the complete crap they are spewing out. I'm an Apple fan as much as the next guy, but some people are just completely deluded here.
The bottom line is that Apple are trying to stop competition. They are scared of Samsung, and rightly so if the recent sales figures are to continue. This is not the correct way to stop your competition. If you want to beat them, make your stuff better.
One final thing. Just to put this out there about the icons, take a look at the LG Optimus 4X HD P880 (god thats a terrible name) - it has the same style icons:
http://www.lg.com/uk/mobile-phones/lg-P880 . HTC also use a similar icon:
http://www.htc.com/www/smartphones/ - it's a fairly standard icon. It's a damn phone symbol.
(Sidenote for the immature kids: I'm not a 'fanboy', 'fandroid', etc - I dont idiotically worship any company, I simply use some of their products that do what I need them to...you know, like any sane human being would)