Normally, I would dismiss a comment like this as just bad RNG. Dry spells happen to all of us, and w/o someone collecting massive amounts of data, there is no way to have any evidence of a change.
The two sources that I know of that could have enough data are HH through the Optimizer and RSL Helper.
Persoanlly, I am in the midst of a very long dry spell. I have gotten a total of 3 Sacreds from Demon Lord in the past 5 weeks, and one was today and one yesterday. So, it was 1 in 4.5 weeks until the last 2 days.....but that is just how it goes sometimes.
And then of course, the other perpective, I could have just entered a period of heavy drops with getting 2 in the last 2 days.