I think it all depends on your definition of "encouragement". For the witnesses, it was an opportunity for them to get more confidence in the GB...a time when they could be reviewed and make sure their FS wasn't waining..a time for them to be encouranged to pioneer or just put in more FS hours....etc,etc,etc. Here's some WT articles on the CO's visit:
*** w10 6/15 pp. 30-31 Coping With a Spouse’s Betrayal ***
One of the ways Jehovah provides comfort is through the Christian congregation. Jane received such support. “The circuit overseer’s visit came at a point when I was very low emotionally,” recalls Jane. “He knew how depressed I was as a result of my husband’s filing for a divorce. He took the time to help me reason on such scriptures as 1 Corinthians 7:15. The Bible verses and his kind comments helped relieve my feelings of guilt and provided me with some peace of mind.”
*** w99 10/15 p. 25 Can You Serve in a Foreign Field? ***
Chris, the wife of Jesse quoted earlier, relates: “I remember our first circuit overseer’s visit, after we had been here just three months. I could tell that the brother was using illustrations and was saying something beautiful to try to touch our hearts, but I could not understand him. Right there in the hall, I burst into tears. These were not gentle tears; I was sobbing. After the meeting, I tried to explain my conduct to the circuit overseer. He was very kind and told me what everyone else kept telling me, ‘Ten paciencia, hermana’ (‘Have patience, sister’). Two or three years later, we met again and talked for 45 minutes, reveling in the fact that we could communicate.”
*** w97 10/1 p. 32 Showing Love to Those in Need ***
“Two weeks before my wife’s death, our circuit overseer paid us an encouraging visit. He even showed the slides that the congregation would see at the end of the week. We were able to listen to the meetings over the telephone—including the meetings for field service conducted by the circuit overseer. At one of these, he had all those present for field service say ‘hello,’ as a group, to my wife. Thus, even though she was isolated physically, she never felt alone.
This is how they feel "encouraged" when he visits. Of course, we all know what a facade is put on by all member's when the CO visits. Special arragements for lunch....everyone goes out in service....everyone is on their best behavior.....can't have him going back to the GB with a bad report. I loathe his visit because he tries to get me to pioneer every year. Of course, I put on a facade of my own, faking a reassuring smile that he encouraged me and I will put in the application at once.
HA!