from looking through people's Main's, Rank and Sensitivity in the other thread ive seen some kind of trend:
before platinum peoples' sens is quite random, they can be high or low.
Most plat players appeared to have a higher sens, while diamond players have a very low sens.
this then changes to a much higher sens when people hit immortal.
only a few radiants but by looking at Panik's spreadsheet, its pretty clear that you can get to radiant with any sens. (wronski sens)
TLDR:
pre plat = random
plat = high
diamond = low
immortal = high
radiant = random
thanks for all the responses to the other thread!