Without a doubt, yes. I didn't find an option in the poll that best describes my take on this topic.
To me, it's all about communication and personality. If the person is willing to have fun and work as a team, the rest of the stuff can be worked out. As the depth gets deeper, skills and team communication become more important. In the tech environment (i.e. wreck penetrations or future dives to 150'), the training and skill level of the team has to be up to speed, but this isn't a DIR only situation. I'm not sure of how many divers with tech training would be comfortable taking a recreational diver into extreme conditions. It's just not a safe thing to do.
On the other hand, if I feel comfortable diving with a non-DIR diver and have experience with the diver that makes me feel comfortable diving with them in those environments, I would consider diving with them, and would slowly work together to learn how to dive safely. However, I'd do the same thing with other DIR divers. I know that many people feel comforatable jumping in the water with other DIR trained divers, but personally, I like to have a few dives in recreational environments to learn their style of diving and to give them a chance to learn mine.
Communication and the right attitude are the key IMO, and without them, things can get scary regardless of the training.
~ Jason