Their focus on the customer experience may actually be religious. They discreetly print bible verses on food wrappers and cups. Maybe they couldn't trust normal people to uphold their Christian affiliation.
The bible verses were introduced in the mid-1980s when the then-president of the company went "born again" (as it was still a family-owned/family-run business at the time, this was easy to implement by fiat). I suspect their continuing presence has more to do with inertia than any evangelical bent at the corporate level; removing them would stir up negative PR with no real purpose.
