I don't think that is accurate, and I wouldn't give Google that much credit for speech recognition. The real work was done first by AT&T Bell Labs and then by Dragon (who bought a couple of innovative technologies along the way).
Nuance is a big evil corporation (I worked for Nuance a while back) that buys up all of the speech recognition technologies now. They basically wait until some innovative new company develops something new, and then takes them over. In my not so humble opinion, Nuance is holding back the technology.