I would say neither. I think it's an inevitable result of being online on dating sites where the mode of communication is email/messaging. Couple that with people who, as I said, are more concerned with getting attention than they are dating, and digital mode(s) of communication become ultra-important because it's how they gauge their own desirability.
I had sort of hoped that with communication being typed out instead of spoken, that peoples' spelling would become better. For example, people would pay more attention to what they're writing and take care to use the correct forms of to, too and two, or your and you're, etc. I didn't find that to be true during my brief stint on dating sites, much to my chagrin.