I went the 90-100% route. Even though someone may be insincere (as an example adjective), they are still real and genuine in their insencerity. Much like the phantasms in a schizophrenic's mind aren't exactly what his perception would believe them to be, they are still real thoughts.
Another example would be to say:
POV1: George Bush was not real with the American People.
POV2: Actually, he was real. A real snake.
If you mean real to be nothing hidden, or without ulterior motivethen I would vote 0-10%.
And then let's not forget solipsism, which might lead me to think that there is truly NO other real person but me. ;p