I ran my own little unscientific test on charging the iPad mini with the Apple supplied 5 watt adapter and the new Apple brand 12 Watt adapter which I purchased seperately. Both runs were done from the iPad Mini being completely dead. On the first run I tried the 5 watt adapter and it took it just a tad over 4 hours to charge from dead to 100% On the second run I used the 12 watt adapter and it took it just a bit over 2 hours to get to 100% The new 12 Watt adapter does indeed charge the iPad mini much faster. I plan on running this same sort of test on my new iPhone 5 as well as my iPad 3 but that's going to take me some time. In any event, the new 12 Watt adapter does indeed charge the iPad mini much much faster.