As usual Matt I agree.
I often rush through my work, but I never turn down a drink or biscuits.
If you can't spare a couple of minutes for a customer then you must be desperate.
It does wonders for customer relations and your reputation to have time for people.
Being impersonal won't make you look good.
If it wasn't for the time I've given customers over the years and relationships I've built up, I bet WFP would have lost me a lot more people.
As it is, a lot gave me a second or third chance.