I saw the lengthy discussion, and I did not see the point of it.

If someone is causing the block rate to be higher than one per minute, that should be detected by counting blocks in some long interval (say, 10 hours) .

If the block rate is OK but the suspicion is that the timing of blocks is being manipulated, that should be detected by plotting a histogram of block-to-block gaps, or of number of blocks in successive 2 minute intervals, again over a long enough period.

Computing the probability of a certain complicated pattern occurring, after seeing it occur, is a tricky business.  The chance of my mother marrying my father was one in two billions or so; that does not mean that my mere existence is a sign that something fishy is going one with the universe...