Compared to the phased-out 10W adapter, Apple's new 12W power brick enables faster charging times for iPhones, iPads and iPods. Specifically, the two extra watts of power shave up to 45 minutes off the iPad charge time. What's really interesting is that in an article 9to5Mac ran a week ago it claimed "Apple also told us that the iPad mini would come with a 12W adapter as well".
This doesn't seem to be true, if a report by MacRumors is anything to go by. The publication relays a note from its reader who was able to purchase an iPad mini from his local Walmart yesterday and confirmed that it came with the smaller 5-watt adapter.
It doesn't appear to be an isolated incident. Additionally, iPhoneinCanada shortly following the iPad mini keynote observed that Apple's own shopping app depicted the 5-watt adapter as part of the iPad mini package contents...