Haha, indeed.
It basically comes down to opinion as there is no proof that this is mostly due to Go, nor will there ever be.
My own thoughts? I think this is down to aggressive advertising, exceptional reviews and a big shakeup to the tired old formula to bring back fans, with Go a factor in there somewhere but nowhere like what people are suggesting.
I guess you could say that Go was a good slice of that advertising in itself, even if it was for the wrong generation of Pokemon!