Just one really small example that I think will be a good demonstration:
Ending a sentence without a full stop is normal
Ending a sentence with a full stop feels cold or aggressive.
Ending a sentence with an ellipsis has a negative connotation depending on the context...
Some of you will be thinking "Uh, that's not true." Which it's almost definitely not true for everyone, but those emotions were ubiquitously conveyed in chat networks I was part of while I was growing up and there are dozens if not hundreds of uniquely text based emotional nuance that grew out of the need to be more expressive in chat/sms/text based messages.
I'd love to see a study on it since I feel it may well explain a lot of miscommunications on the internet. If you assume the person you're talking to knows the 'rules' then you could be totally misunderstanding them. My partner finishes all her sentences with a full stop and on more than one occasion I've had to remind myself not to read into it, it's just that she's not 'from the internet'.