Now, that's an idea for a study: Utrecht University researchers find that things like temperature, smell, proximity (all of which are absent in CMC, except for proximity to some degree)affect judgments we make about others.
Smell and proximity are obvious predictors, a no brainer I would think, or at least I used to think until I moved to the country of shameless garlic eating (yes, that's the US). Temperature, on the other hand, is interesting. If one is easily inconvenienced by, say, hot room temperatures, or hot weather in general, like I am, their judgments of others would tend to be harsher, and prone to attributional biases.