It's pretty much agreed all over the internet, that this guy was irresponsible. This story has been in every gun forum since it came out.
First, the Galco Holster he had worn for over a year on a daily basis, is a good one, but was never meant to be worn like that. It's an occassional light duty holster. It was never made to be a daily heavy use, service type holster. At some point in time, he had to recognize that the leather had become soft, and the holster was not serviceable, but he continued to use it.
I carry a Glock22c everyday. It is a good weapon, with several built in safeties. It is no more prone to discharge than any other semi with or without a thumb safety. Try dropping a revolver, and then a Glock, I know which one will get you tap dancing. If you have a weak holster, and you are one handed holstering your weapon, you're asking for an accident on two counts.