predicting text and predicting text well are two very different things.
is your claim that dasher does not predict well?
or rather, that google scribe predicts better than dasher?
it would surprise me: dasher adapts to the linguistic habbits of the particular user. it learns in real time.
google scribe doesn't appear to do this. it doesn't know who i am.
I've never used dasher so I can't comment on it