No, and on average, we also know more about religion than religious people*, but, since we don’t believe in any of the elements of the Christian faith we’re trivially non-Christian on that count.
However, there are two other ways to be ‘Christian’ that I’ve noticed: Virtue and Culture. Culture is obvious, so I’ll focus on virtue.
Virtue needs to be defined. If it means ‘Helping people and doing good by the standards of the real world’ (Temporal virtue), atheists are certainly no worse at it than religious people, on average. If it means ‘Leading people to the True Faith and getting them to the best possible afterlife’ (Religious virtue), atheists obviously don’t do that at all.
Christians certainly preach Temporal virtue a lot in sermons and a number of them practice it in their lives, as well. You can even take some of Jesus’ words and use them to defend the idea that Temporal virtue is most of what Christianity is. If you take that notion, atheists, on average, make pretty fair Christians.
On the other hand, other Christians focus a lot more on the afterlife and, therefore, Religious virtue. Deathbed and death row conversions are all about Religious virtue, as is Jack Chick and everyone else of his ilk. Getting Creationism into public schools, or any other introduction of religion into politics and government, is Religious virtue at the expense of Temporal virtue. Atheists see Religious virtue as a complete load and, therefore, we don’t practice it.
(My notion of separating Religious and Temporal virtue is an atheist idea in any region dominated by Abrahamic religions, at least. The idea you can have Temporal virtue without Religious virtue is heresy to the most religious among the followers of those faiths. The fact atheists do have Temporal virtue without Religious virtue, that we’re “Good Without God”, drives some religious people nuts., and they invent all kinds of awful lies about us and all our Darwinists and Secular Humanists to compensate for all the things we don’t do even though we don’t consider them sinful.)
*(We’re within spitting distance of the Jews and Mormons, and a more comfortable margin above ‘White evangelical Protestant’. The clustering really kinda stands out.)