If someone doesn't have anything to back up his claims (hard data provided by Blizzard) and relies on indirect, partial data that you can't connect to the number of players in game (reddit, MMO-C, twitch), it's wishful thinking at best and dishonesty at worst. You can use 3rd party sources if it's at least connected to the game (like wowprogress for the number of guilds who downed boss X for example).