Personally I'm 2 for 3, so perhaps more optimistic than most. But personal stats are meaningless. WFR told us to try CPR resuscitation on lightning victims, so yes, I'm going to max out on trying to bring them back if ever I encounter a lightning victim. Also I would put the entire CPR effort into context. I performed CPR on my wife - no issues with that, that was one of my success stories. I hang out with Scouts, I hike with them, counsel their merit badges, counsel their eagle projects, watch them grow up, know their parents - there is nothing that could keep me - short of two broken arms - from a vigorous if fruitless effort to rally all available scouts to save the life of one of our friends lying in front of us. Damned if I'm going to quote the known survival rate to a grieving parent and abandon hope before even beginning.

Statisically speaking the specific experiences of highly experienced FD folks may or may not map to actual survivability across very large populations, or even to very specific contexts like lightning strikes. I think that's where WFA / NOLS advice comes from about lightning victims, in the wilderness context, and not in urban or rural survival rates. As I understand the fire rescue stats, AEDs have really given survival a bump in the stats, and for good reason; and CPR education and training have helped too, in urban-suburban contexts where the EMTs are arriving within minutes and not 20-30 minutes after. And the focus on compression only resuscitation may also give an overall bump, if only because it restores a bit more circulation while shorting the patient on oxygen a bit, as long as EMTs arrive with their panopoly of drugs. Those drugs give the patient the best odds.