I'm just guessing here, but from the reports I've read from new BG owners I suspect S&W may be using a stronger hammer spring in the BG to prevent light strikes.

Now for a show of hands. How many of you BG owners have actually taken the firing pin out and cleaned it along with the channel? Since the rear sight and extractor have to be removed first, I'm thinking not many of you have.

I don't remove the FP from mine as often as I do the more simple ones from other pistols, but do remove it for a thorough cleaning once a year. I will however use brake-clean and compressed air to flush it out after every range trip. I also work some dry lube (graphite) in through the FP hole at the breech.

I've never had a light primer strike, or any other kind of failure with my BG. Could be luck, but I don't think so.