the pot and the kettle
As said before Apple are pretty good at lying. Security through obscurity is not security.
As for price, last I checked, for a PC with X hardware you pay least if you make it, about 80-500 more to get it pre made with windows at the same spec and the same difference again for a mac.. Back when a slightly OCed E6700 gave you a desktop processor money couldn't buy I built a system for about £1400, my friend spent the same amount on a mac, got ram that was one step down, a processor one step down, instead of a HD2900 graphics card it had the midrange card which was about 40% of the cost and performance ... Even with those price cuts, I imagine PCs with equivalent spec are faster. The price cut will have done a lot to help but in the end you pay a LOT for OSX. Microsoft should just post edit the videos and be done with it.