Those are all most certainly analog thumbsticks.
Have you ever used a PSP or a 3DS? People generally use the term "nub" to refer to a analog stick mechanism that slides rather than tilts, such as how the PSP, 3DS, and apparantly the WiiU operate. The analog sticks on a N64, GCN, or Wii controller most certainly tilt just like the analog sticks on a Xbox or Playstation controller do and aren't very different beyond some styling differences.
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