Yea seems realistic. Also much depends on september announcement. Price can either tank or shoot to the moon.
Gavin has always been speaking of the stability of bitcoin protocol/system and not the price.
I doubt Gavin's announcement has a direct relation to the price of bitcoins.
September has to do with cashing out, which should help keep the price from rising too fast.
Ultimately a long term higher price is desired by Gavin and most of us.
Hence I don't think he will want the price to crash. But that's just my take.
Making it easier to cash out won't crash the price unless you assume the only reason the price is so high is difficulty in cashing out. Making it easier to get fiat for bitcoin will increase the usefulness of bitcoin, thus supporting price, but in a sane manner.
Gavin running "full-time" suggests his vision is "long-term".
I know many people here do, but I don't usually make strong statements when I'm guessing . But keep up the speculations. It's amusing me.