I doubt that.
The Mac mini 2012 has a 12 V/7.1 A (≈ 85 W) power supply:
http://d3nevzfk7ii3be.cloudfront.net/igi/GDHcnEiKtSf4nGhX.huge
The Mac mini 2011 had a similar ≈ 85 W power supply:
http://d3nevzfk7ii3be.cloudfront.net/igi/HubvGgpDbWGZCMLu.huge
Each USB 3.0 port needs 4.5 W (5 V/0.9 A) for external devices, which means that the USB external device support needs at least 18 additional Watts. And let us not forget Thunderbolt, which needs 10 W for external devices (10 W per TB port).
Cooling, WiFi and other components need also additional Watts. And let us not forget, that no component in a computer reaches 100 percent efficiency.
Sixty Watts is like two hot & young woman at the end of a very cold day. Unrealistic.
In that case I can see them beefing up the rating of the power supply - likely they'll have been measuring the heat production in the power supply and now know how much heat they will be able to develop to stay within certain limits.