Well, I haven't had the opportunity to look at other things he did, but I always like to read reviews about the same topic/item , but written by different people looking at it from a different perspectives.
Regarding high shutter speeds you are probably right, but IMHO shutter speeds of 1/2000 and well above are not that unusual. It is more the question of the noise you get with high ISO, especially considering people shooting with camera models that are less low light tolerant and thus more prone to high ISO noise. And if you look at what
@Steve wrote about noise, high ISO and cropping, from my perspective it is understandable that many people become hesitant when the Auto-ISO goes through the roof. This applies especially because the people being on a budget with their camera usually have to cope with slower glass as well for the same reason. Now, if you take 1 stop by changing from a 500 f4 to a 200-500 f5.6, you go from a D4s to a D7200 and give away around 2 stops (minimum !) in terms of noise tolerance we are talking about 3 stops in total which can mean pushing your ISO from 3.200 to 25.600 with a given shutter speed and this is well beyond the comfort zone of most of the cameras. Yes, you can go further these days with thinks like AI-based denoising products, but there's also things like dynamic range and color rendition that usually drop considerable with increasing ISO.
Having people like Ari,
@Steve, et. al. showing us what is possible doesn't autoamtically mean that everybody of us is able to achieve it with the knowledge and routine (s)he has, plus - and I hate to say that - beside all there are still aspects that are depending on the gear you use and how you are able to use it. I perfectly agree with
@Steve 's saying that 80% of an image is made 4 inches behind the viewfinder, but if there are photographic topics where this ratio may move towards smaller figures, it is probably BIF. IMHO it is one of the topics requiring most practice and intuitive, sublimial coordination while shooting combined with good capabilities to actually "reading" the bird.