What precedent in the Scriptures is there for this distinction? I realize this is a can of worms that could be opened. But I know that remember sitting in an OPC church as a kid and was told that the visiting Ruling Elder wasn't really preaching, he was just exhorting, and my 10 year old mind was sure thinking, "I don't care what you call it, it sure sounded like preaching to me."
I haven't studied this issue out, so I can't make any claims. It's just that on face value, it seems disingenuous to say that when the exact same thing is done, it's really something different. (I do understand the emphasis Presbyterianism puts on ordination, etc. I'm just looking for some biblical clarification on the subject.)