Output: DC 5V 1Amp Isn't that going to mean that a lot of devices (iPad?) charge slow? I mean, I think it's more expensive to get rated for higher amp-age but

Output: DC 5V 1Amp Isn't that going to mean that a lot of devices (iPad?) charge slow? I mean, I think it's more expensive to get rated for higher amp-age but they could have gone for 3 amps, right?