venice: Just look no further than this ..
As that pro football photographer says, every innovation comes with a learning curve and he shoots with nothing but Sony mirrorless.
There is a great shot of him using what looks like an A7r2 with the fast focusing 70-400G2.
His results make it clear that this DPR article is about shooting pro sports without going through the learning curve with the gear and not about any limitations of the gear.
Being a Sony Artisan and being familiar with his gear is a big part of my point.
Being biased or unbiased is not related to being clearly a newcomer to this gear in this situation.
"would I rely on it as a third body at a sporting event? No"- That is a very, very broad conclusion which appears to have been reached after using unfamiliar gear for a single day at a single type of sporting event. A conclusion that appears to be at odds with a pro sports shooter who is putting in the effort to learn the gear.
I would say that Gene's results are nothing short of outstanding. Given the comparatively lower fps of the Sony I imagine his keeper rate is entirely reasonable and possibly higher with Sony.
Look at it this way - I would be cautious in drawing any significant conclusion using gear I was not experienced with. Especially when it is clear others, with experience, have success where I did not.
Just look no further than this ..