Hybrid Owners: Friend reports 19 mpg avg- that possible?

We are considering purchasing a CRV hybrid but a friend returned their lease and noted the dash registered an 19 mpg average. Is that physically possible? We would need to explore other alternatives if so, but, knowing this person, they may have either A) idled consistently / driven all out all of the time or, maybe more likely B) been driving the non-hybrid and misremembered. Thoughts?