I hate to revisit 'the incident' but in the original video he said he went from using the Safariland holster that you push down and forward to release the gun and switched to the Serpa holster trying to do the same close retention drill. In the original vid you see him try to release his 1911 from the Serpa using the same method you'd use for the Safariland...instead of resetting himself and trying again he pushed the gun back down, stabbed the Serpa release with the tip of his finger and yanked the gun out. At some point during all that he clicked the thumb safety off so it was about 3 or 4 things that could have gone wrong that DID go wrong. Take one of those elements out and people would only make fun of him for his hat...and yes well a few other things but not for getting shot or using a particular holster brand.
The bottom line is train to release the Serpa with a flat finger, indexed like you should, or don't use it. I'm still undecided on it. I picked up a cheap one to "play" with, but I think I'll go with a nice leather holster instead when I need to OC.