Testimonials can be displaying with the following technique:
Set "when displaying the summary show the intro only" and set "When displaying the full article show just the body". With these settings the article has two separate pieces.
Here is an example of how to use it
One session with you solved my problem - John Doe
Dear Dr. Miracle
I was so amazed at your treatment. I have visited many others with no success but just one session with you solved my problem. I am forever thankful.
- John Doe
The above would show just "One session with you solved my problem - John Doe" on the main page, but if they clicked for details they would see the entire letter starting with "Dear Dr." If only the letter were included with the default options, then the main body would show a line like "Dear Dr." that did not contain the main point of the testimonial.