I saw Motorstorm 2 last night and played a little split-screen. Racers aren't generally my thing, and this one did my head in! The vehicles control like they're on ice - they don't turn! I stuck with the bike in the end as the only one I tried that actually went right when I turned right. And the open courses were also confusing for a first-time racer as you don't really know which way to go.
If you play the game just starting with the first track in the series, you'll ease into the handling a little more gently. Generally grip is excellent, but it matters a lot on what surface you drive obviously. It's all fairly predictable and easy to deal with once you've gotten used to things. But it can be a lot to take in initially for sure! Some obvious reasons for lacking grip apart from the obvious driving on wet grass and mud-water is ... wait for it .. not having any tires on the surface. What with all the bumps and the physics, that does happen sometime - part of the trick in getting the most out of your boost in this game is knowing when you're actually not flying.
So far I've only used a bit of braking with the R2 button (brake/reverse). I've never even touched the handbrake, if that is actually something separate, so thanks for the tip in that case guys.
On the plus-side, motion steering is in the game (which I didn't race with). I accidentally turned it on in the car selection screen on the third or forth race. There are three control layouts at the vehicle selection screen. Press Square to change layout. I think Layout 2 was motion steering.
You should have known from the mere fact that I ended up buying the game. I wouldn't have if motion controls had been in, as I've said repeatedly.