Bossanova, I think some of that 'staccato' you referred to is a combination of a couple things, but one of them may be where you mounted the camera. There's so much vibration right there. I have a go pro and have found mounting it on me minimizes some of that, not all but some. But those locations on the bike are pretty damn cool.
Might play with some settings as well. Sometimes that HD resolution on the goprpo is a little bit of a curse as well as it's just trying to capture so much detail, its processing all of that detail between the vibrations. Lot to take in.
May or may not kill it completely, but might help a little.
And what the hell was that truck doing coming around a blind curve like that? Crazy!