I found where I was reading this.. at
Flat
"With minimal artificial manipulation of color and brightness, Flat maintains a subject’s information as much as possible and faithfully reproduces it.
As you can see in the graph, images or movies taken with Flat contain rich information extending from shadow to the medium brightness range. Also, from the medium to high brightness range, artificial processing is minimized and the subject’s information is maintained.
Therefore, Flat is optimal for capturing raw materials to be used for post-shooting adjustment.
]Not only for still images but also for movies, this rich Flat data is very useful for post-production as raw material. You can achieve movie work that precisely matches your creative intention via comparatively simple post-shooting adjustment. To shoot such raw materials of still images or movies to be adjusted, the default setting of Flat is recommended.
Moreover, in addition to using it as a raw material, you can adopt Flat as one of the options of Picture Control to realize your creative expression, utilizing its characteristics to reproduce delicate gradation, color and texture naturally."
So, I guess my question now is, Is Flat picture control basically the default in RAW?