When you looking at a shield in the creative mode. It still showing metadata value. Items that don't use metadata usually do not display their data value.
Environment
OS : Windows 8.1 Pro CPU : Pentium(R) Dual-Core CPU E5400 @ 2.70GHz RAM : 2 GB DDR2 Java : JDK 1.8.0 Update 66 x64 (Used for modding) Graphic Card : NVIDIA GeForce 9500 GT OpenGL Version : 3.3
Confirmed.