The assertion, first popularised by Jim Packer, that American Christianity is a thousand miles wide but only two inches deep is intended as a perspective of the Bible belt. Actually, American Christianity as a whole is at least only 800 miles wide. That is, there are significant geographical and cultural pockets of America where gospel Christianity is a rarity. It's not that it's ephemeral or superficial; it doesn't exist. In particular, the North West of America and the North East of America are graveyards for gospel ministry.