just thought id throw it out there i have a 2006/2007 prius that on cold start up works its self up to a rattle/ vibration in p mode on charge
no, and i don't recall seeing any other threads on it either. how many miles? how long have you owned her? when did it start?
I know it's an old post, but to answer the question, yes it's normal. On cold mornings I've had a rough start-up and it goes away after the engine is warmed up.
With this type of issue it's often worth looking into exactly what type of engine oil you're using. Sometimes changing the brand/type of oil will ease the problem.