Would anyone notice if you removed one accessory?

When I look back on some of my past sermons I readily acknowledge that I should have pulled the plug earlier.
 
Sometimes I've been boring.
Sometimes I've gone way too long (either the sermon or the entire service).
Sometimes I've over-promised but under-delivered.

This Sunday I'm preaching the final sermon from our Song of Songs series.

While I was recently away at a conference, I went to a effective communication and preaching elective.

In truth, I left underwhelmed.

Whilst the input was solid enough, the way it was delivered, whilst engaging (this bloke was surely a great communicator) seemed to fly in the face of his core "authentic preaching" message.

But, he did say something which pricked my ears.

If you stopped your sermon half way... what would happen?

Would anyone be able to tell?
Is your introduction clear enough that they'd be expecting more?
Would they want/need more?
Would there be a sense of disappointment or thankfulness that you sat down early?

There is a Coco Channel quote which states that when a lady gets dressed, one of the final things she should do is look in the mirror and remove one accessory.

I wonder if preachers should do the same thing with their manuscripts...