Sorry I was a bit grumpy in my wording, I thought better of it after having a shower but you'd already replied. Your fault for getting "if I ever lose my faith in you" stuck in my head :)

I think if Incontrovertible proof of a God(s) or no God came to light, there would be masses of conversions to whichever 'belief' system was correct, as it's no longer a belief system. There will always be those that hang on for years and even generations longer. Flat earth believers for example.

Absolutely.

Although I think I'd stick to the "I've gone mad" hypothesis for quite a while. When I fell into a coma and woke up in hospital it took them quite some time to persuade me I wasn't at home, hallucinating :) (It didn't help that I was semi-hallucinating for a bit)