Well turns out the dealer I bought my spark at never took it out of "Transport mode"!
The light is off now but it's still shuttering on take of but I'm guessing it's due to it being such a low powered motor. Not sure.
did you bring it up to the dealership? if the shuddering is caused by the car and not you that should be something you should bring up.
Awaiting Salsa 2013 Spark