Like I mean, good for you that you're able to recognize that two people like to play the same game and are capable of being impressed by a feature?
This is hardly ever the first time there's been a GAF thread about the same thing, and will hardly ever be the last time. A bit ago we had two people getting hacked with purchases made in their name on PSN. Both of them had Spider Man avatars.
Does it mean they somehow motivated eachother's threads? An ulterior motive to advocate against Spider Man and PS4s? No. It simply meant two people were hacked that liked Spider Man, just like this thread and the other you linked are just two people being impressed by the LFG feature and like Gears of War.