Plenty of adult peeps with ADD without the hyper, I think. In fact it is thought that many children with ADHD lose some of that hyperactivity as they move towards adulthood too. Many of the adult ADHD symptoms are more related to the attention deficit aspect rather than hyperactivity.
I was diagnosed with inattentive type ADHD well into adulthood, and looking back I don't think I ever had hyperactivity. ADD drives me nuts. I wish my brain was more focused! But I cope with it, and the meds help enormously. Without meds I'm not the most productive person around.