Dear Follick,
For the purposes of the survey, he would be Orthodox like me and you. I think that is the whole point of the study. But everybody on this thread has a problem with that, so I’m probably missing something here.
In general we don’t term such people. Either ‘he isn’t frum/orthodox in private’ or ‘he has his struggles’ or ‘he is not in a good place’ or some other phrase, depending on the nature of the story.
If we must have a term for societal purposes, than I suggest ‘Orthophony’.
Sadly, I know a bunch of young people who left Orthodoxy. Some are still in the same general locale and some went across the country. Both may call themselves Ortodox but unobservant for this survey. It is a reflection of their inner confusions.