I agree. That's not to deny there may be some problems, but what doesn't have some problems? I've failed to release conventional thumb breaks for two main reasons. One, I simply miss. Two, and more troubling, is after the thumb strap releases, the thumb strap can get caught and not release the gun cleanly or at all.
Also good points about the jam and tear aways. As have I stated, just about any paddle holster will fail in retention drills and nobody is writing critiques about paddle holsters because they failed in retention drills.
It is interesting that two of the incidents the article referred to occurred with Glocks. I personnally know someone who shot himself while drawing a Glock from a non-retention holster.
It's funny in a way, I chose the SERPA to have some retention and specifically to avoid a thumb break. I believe the SERPA will prove to be far superior to a thumb break for reliable release - at least for me, I can already see that it's better.
I also picked the SERPA because I liked the natural draw stroke release, and it works just as designed.