Mocks competition, still doesn't sell well. I can't claim that any of the anti- campaigns helped. Same goes for Samsungs apple-mocking ads.
It is incredibly difficult to compete with Apple on Apple terms, thats out-iPad iPad and out-Macbook macbooks. Thats why copycats fail. Simplicity of iOS is actually strongest weapon which makes its both consumer and business friendly (no businesses like to lose time over OS optimization and etc).
Android, while visually is very iOS-like, is actually very geeky inside and is perhaps as complicated as Windows configuration for PC users. Its understandable that under certain conditions, users actually prefer to re-install (re-set) both Android and Windows rather than deal with optimization of current installments so difficult they can be both to deal with (driver issues, OS issues, hardware issues, etc).
People will always prefer simpler decisions. Thats why actually Windows Phone, I think as a closest to iOS in terms of user-friendliness, could succeed and break Android spell under some conditions, though probably it won't happen. Right now, WP is underdog, Android is monopoly and iOS (Apple) is an established player respected by all. This is quite crazy market situation and its very difficult to understand that.
Anti-Apple campaign by MS and Samsung will not be fruitful, because attacking an established player with good reputation for quality and user-friendliness will be not effective since both Surfaces and Android can't reach Apple levels of user-friendliness and simplicity. Therefore, these campaigns will not be truthful. For example - how much you usually multitask using a tablet? I can recall having music player on while playing Zynga poker and thats' it or editing some docs and copy pasting from email into a text file. I am only talking about my personal experience so those who have to edit 100 column Excel tables with lot of scrips and programming on a TABLET may have different opinions.
To be honest, neither work for me requires having both apps at same time on screen and can be by simple Apple-like multitasking. Even when working on PC (in my case i3 mackintosh) I'd rather prefer having main app full screen rather than a number of different windows of different apps at same time. So, that live screen multitasking has very limited value in my opinion. Consumers will believe MS only when they'll that PC with Windows have superior feeling to OS X devices.
As for Samsung, its campaign is so unfocused thats it not even funny. Samsung, a hardware company, which doesn't have a own decent OS even on its TVs, ridicules a company which produces simplest and yet state-of-the art OS for such variety of devices as MP3 players, phones, tablets, TVs and desktops/notebooks, servers and workstations. A consumer will believe Samsung only when they see a decent Tizen or Bada device which doesn't stink - and there are not many.