Why are you referencing this garbage as reason for your statement? The poster just wrote in a thread 600,000 miners stopped, linked their website but didn't reference where this supposed article or information comes from...
The hash rate isn't dramatically down, compared to the price drops anyways.
Well, it kind of matches
30 days price drop is currently at 31.81 %.
The last difficulty drop was -7.39% and we're expecting something between 11-12% so it will something like 20% over the two periods combined.
Adding the fact that more miners are keeping on mining because they have no way out of this mess with rent and other contracts paid in advance and other mining but with diminishing profits at the same time, we have more efficient gear coming up but still going down...
And the news about the miners being shut down it obviously true by the above numbers.