Yes. People absorb their society's cultural mores and habits and speech. Most English-speaking people, whether they are Christian or not, use the same Jesus- and God-related swear words when they drop a can of soup on their toe, or when their spouse fails to comprehend the argument they're making. Similarly, when growing exasperated with their employees or teenaged children, they tend to raise their eyes and hands toward heaven in a beseeching gesture, and might even mutter "Give me strength!". Not because they really expect help from that direction; simply because it is a habit of their culture to place a sympathetic deity up there. A Roman father would probably roll his eyes at his household shrine and a Druid would gesture toward the holly grove. Similarly, when people are spared a tribulation, encounter a favourable outcome, they are quite likely - atheist, agnostic and undecided, equally - to exclaim "Thank God!" or "Saints be praised!" Not because they really believe the good luck came from that deity; simply because it is the habit of their culture.
And so, when a person who is not a believer, but neither is he locked in a dead-set vendetta against the Christian version of godhood, is the beneficiary of a great piece of good luck, his "Thank you" is automatically directed to the heaven of his cultural tradition. Emotionally, that's both more direct and more satisfying than trying to apportion the credit among designers, engineers, car factories, highway construction crews, traffic law makers, other drivers, the luck of weather conditions, etc. Just as, having scored a goal, football players look up and thank the sky, which they know had nothing to do with their three seconds of triumph. If they thought Jesus was scoring their goals, they wouldn't train and practice so hard, would they? People who really believe God will heal them don't go to the hospital in the first place. But people who trust in doctors, nurses and medicine, still thank God for their recovery. It's an emotionally satisfying habit.