I've said this many times about WoW but many don't believe me. Some think I exaggerate. I haven't played the game in a few years so maybe the community somehow changed for the better(?), but the last time I played I did encounter it fairly often. Normally it was just some silly mean comments flung about for a few seconds to a few minutes and then nothing really happened. Still unpleasant to watch though. I didn't exactly queue for content to watch people bicker about dps even when things were dying crazy fast.
And of course there were times when it got really bad and progress got delayed for 5+ minutes because a full blown argument started. Usually these ended with someone leaving or the whole group disbanding.
These lengthy delays weren't super frequent for me in WoW, but I did encounter them at least once every month or two. This might seem small, but consider this: I have been playing FFXIV for years now and I can count on one hand how many times I saw that happen in that game. For me there has definitely been a very noticeable difference in how frequently disputes occur.
It wasn't always someone being mean or unreasonable about another person's performance that caused the above. Sometimes it was friendly and maybe even needed advice that was met with raging. Either way both situations tended to result in an exchange of rude remarks.
I'm not anti parser. I recognise they're excellent tools. There is nothing wrong with parsers. What is wrong is often their users.
I said it before, and I'll say it again: the community cannot be trusted to give and take criticism sensibly or respectfully, and this is why we don't have an official parser.
Unless we somehow prove to SE that the community as a whole is mature enough to not abuse the tool, I doubt we'll ever see any endorsement beyond the grey area of parsers also known as "don't ask, don't tell".
EDIT: I just want to clarify that when I speak of the frequency of disputes in both games I am referring to content accessed through the DF tool. I am not talking about pug raids. I rarely did them in WoW, and I rarely do them in FFXIV.