I'm not going to discuss this review specifically, but yes I feel mainstream audio is getting scared.
They've made their money from expensive items with huge profit margins. And yes, quite often needed to be expensive.
But more and more, it's possible to get great performance at astonishingly low prices. And low prices mean small profit margins, and that's not how the high end audio market is structured. And now, people are realising that, in some cases (not all), extra money doesn't buy you better performance. If even 25% of people who care about sound quality first realise that, then the high end market starts to shift towards being untenable.
But for many of these reviewers, it's not a question of them taking money. This is their job, their livelihood, and their relationship with the high end audio industry is symbiotic. To be fair, they have excellent presentation skills, and are entertaining to watch. But when people realise that a good delivery doesn't mean an accurate review of the sound quality you'll get, then they start to tune out, and these people's jobs are at risk. And that's the monetary incentive, not some bribe, or underhand payment.
Some high end audio being a rip off = the end to some of these reviewers. Fewer high end reviewers persuading us to unnecessarily part with cash = an end to some high end audio. Vicious circle.