So here's my experience take for what you will and make your own mind up.
On a dive boat not a live aboard - a cattle boat in Cozumel - Four groups of 6 on the boat.
After the first dive I notice one guy from one of the other groups who just could not sit still and looked very uncomfortable. After a minute or so of witching the guy and Boat DM's not noticing it and checking on him, I finally ask him if he was alright. He complained about pain in his low back and I believe it was his left hip. Also complained about numbness in the same leg (left I believe). It was sudden and started minutes after he got back on the boat. The exit/getting back on the boat after the dive was easy - long angled ladders in the water from the back of the boat not a lot of surface chop. He could walk on the leg but is was labored walk such that you would have if you had a hurt ankle or knee not like the whole leg was a dead weight. He was coherent - knew the day of the week, knew where he was, knew where he was staying, his home town, no slurred speech, or slow response to my "casual" questions. I asked him if he thought he might have taken a DCS hit - to which he and his wife's responded "what is DCS?". I said "you know the bends"? His and wife's response was "no, we did our safety stop". He attributed it to a back injury he previous had that had been gone for over a month. I asked if he had the numb,tingling leg with the back injury. He said no.
Over just a few minutes he complained about it getting worse and the numbness in the leg was now pain, everything was very painful - at that point I told him that if he did not say some thing to the crew, I would. He did and they started toward shore but he refused any treatment and to not make the second dive.
He did the second dive and lived. After, I asked him how he was feeling now. His response was "You know about five minutes after I got down, all that stuff went away and I feel much better now!"
I do not know whether it actually was DCS or his previous back injury that he just tweaked the right way while getting back on the boat. I know what I think, what do you think? Did he ignore the DCS symptoms and attribute it to a different injury?
I will also say this - I have around about 800 actual in the log book dives, there are more that I have not logged - that is the only time I think I have ever come close to what might have been DCS.