In which case 50 minutes a week becomes 10 minutes a day which doesn't strike me as unreasonable - a bit of prayer, bible reading, maybe a weekly group of some sort and you could see how they got to that number.
Plus I suspect this is one of the things people will over estimate (in the same way that they'll probably underestimate watching TV).
> Here's how the average American with a full-time job spends a typical workday
It mentions "workday" specifically, so it probably doesn't include weekends.