It does NOT mean this is what Samsung did but remember that the USB STANDARD only allows 0.5 Amperes on the STANDARD charger. To do more he had to adhere to some USB handshake that is custom, proprietary and more to tell the device there is more than 0.5 Amperes available and to draw more than allowed.
Here's a link about it -> BUT FIRST A DISCLAIMER. YOUR PHONE YOUR RISK.
None of my USB chargers worked on my new phone. So I bought new ones with higher output, but the Galaxy Ace only accepts charge from one - for a Archos 80 G9 Tablet. The tablet trickle charges on 1.5A output from any charger but fast charges from its own USB charger, even though its own charger is still 1.5A. It's own charger - and the only one that the Galaxy Ace charges from - says Efficiency Level V (the V is printed inside a circle).
Can anyone explain all this? And can I get a charger for my car that will meet this standard?