This just tells me to go out and buy one of these, since Apple sees it as a threat. Which means its probably a decent device. They haven't pulled a stunt like this on all the other crappy tablets that have come out.
Like briandear mentioned, this is more directed towards Samsung in particular (although Android itself is a big part of it, and this is part of a broader war on Android), but at least part of the reason I think Apple is going after the Galaxy Tab so strongly is that is that, from a physical perspective, it looks quite a bit like the iPad. When a few of my co-workers got them and had them sitting on their desks, I sort of assumed that they were iPads - they very closely resemble them.
While I think Apple would still be pursuing them without the physical resemblance, at least some of the strong reaction you're seeing is due to it, so I wouldn't necessarily take their reaction as an endorsement of the Tab (although I have heard it is quite good).
My guess if it looked like the iPad but provided a sub-par experience, Apple would be laughing in their Ivory Tower about how cute it is they think rounded tablet edges make all the difference.
