Wow, so much weird information in Jerry's post I hate to even touch it.
I will just reiterate that the whole house units don't clamp low enough or fast enough given the equipment I've lost to lightning which is why the very same manufacturers who sell whole house units recommend you supplement them with outlet surge protectors for sensitive electronics.
I will also say that you need to be very careful in buying boutique power conditioners as many of them aren't even UL listed as surge protectors. Testing a device for adequacy during a surge protector is not a trivial thing. It requires specialized equipment and engineers with expertise in surge arresting. Always look for this rating when considering whether a power conditioner is intended to be a surge protector or a very expensive tone control.