Oh yeah, here is a fun fact that I think relates to this topic.
Recently (about 5 days ago) I started playing Mono Black Devotion in standard on MTGO. I don't have much experience with the deck, so I have been jamming tons of matches in the tournament practice room. Here, (for those that don't know) you play matches of MTG that are competitive but nothing is on the line.
There has been a very noticeable rise in the amount of opponents that will concede the WHOLE MATCH after I win only the first game. This is generally a sign of sour grapes. But seriously, it has been a noticeable rise in whole match concessions after only 1 game. Contrast with, for example, when I used to play Mono Blue Devotion which packs hardly any removal. Back then, players hardly ever conceded the whole match after 1 game.
nothing new. Even in EDH games, I will turn 1 Duress. They will say no thanks and leave.
People will rage all the time on MTGO. EDH: Turn 1 Duress and before resolution, they would respond "No Thanks" and concede..... Or after 2-3 counters, would just be like "way to play magic" or something like that....