Currently at the bottom of the sermon editor is a word count and estimated time length for sermons written out word-for-word. I've found this estimated time to be very accurate.
What would be nice is to be able to select a portion of the sermon and get that same information for only what you have selected. Microsoft Word has a similar feature as seen in the snapshot

In Logos it would be handy to tell which sections were longer or shorter, to help balance the overall piece. I can see quickly if my introduction is too lengthy in comparison to the rest of the sermon, or if my points are at a comparable timing at a glance.