Currently Being ModeratedNov 13, 2012 7:18 AM (in response to Swimwell)
The 5W and 10W chargers are quite different in appearance. I doubt that you received a 5W charger.
With the 10W charger the iPad may require 6 hours to charge from a fully discharged state.
Currently Being ModeratedNov 13, 2012 7:21 AM (in response to Swimwell)
If it there is something different printed on the adapter than 10W USB Power Adapter you received a wrong item.
From the outside those two adapters look similar at first glance, at least my iPod charger and the iPad charger.
Usually the iPad charges about 10% per hour, so charging an empty device can take longer than expected.
Currently Being ModeratedNov 13, 2012 7:42 AM (in response to Swimwell)
iPads must come with a 10 or 12W charger. The Square kind like in Demo's picture.
iPhones and iPad Mini's ship with the 5W charger: