Put yourself in the customer's shoes: when you get a speeding ticket, you don't want the attorney you hire to take care of it to bombard you with acronyms and stuff you don't understand. All you want to know is what you need to do to get the ticket off your record. We feel the same way about our roles in clients' lives: we want to solve their problems as opposed to making things more complicated by showing off (intentionally or not) jargon that's meaningless to clients. This seems like a no-brainer, but it's amazing how many service providers cannot get themselves to explain processes in a simple, straight-forward way (several of our CPAs come to mind here). When dealing with your own clients, our advice is to make things as easy on them as possible -- after all, they are not translators or interpreters, and they don't need to be: that's why they have you.
We'd love to hear your thoughts on this!