>"Can I marry your daughter?" "Sorry, no" or "Sorry, no, she's already married" isn't less polite inherently than a 30 page screed about how you would rather just give her a shotgun to kill herself instead of torturing her like that, etc.
Counter-examples aren't a very good denial of correlation though. Sure, you can come up with examples of long replies and short replies where the longer reply is less polite, but that doesn't say anything about the general trend.
Counter-examples aren't a very good denial of correlation though. Sure, you can come up with examples of long replies and short replies where the longer reply is less polite, but that doesn't say anything about the general trend.