I don't know enough about the mechanics of it all to know either way (least of all the console side of it) but I do know they tried for hours to "find" each other, both were live-streaming on Twitch at the time and both were taking suggestions left right and centre about things to try. It really was very exhaustive.
Doom is definitely not for the squeamish but as a shooter it's practically flawless... graphics, pace, story, difficulty, opposition etc... It really is a wonderful game and after lots of negative press during its beta phase it was a welcome surprise. Cities Skylines is basically what the reboot of Sim City should've been, the one outshines the other in every department.I didn't buy Doom because I knew I would hate it (and be shit at it). I felt justification of that when a colleague showed me videos of players ripping opponents heads apart and other grotesquerie. I'll look at Cities Skylines a bit harder though if you reckon its a trend-bucker.