Again, those are real life hours, which is why you absolutely cannot play with the default settings if you want to enjoy this game on single player. To give you an idea of what I mean, with the default settings it would take you almost two real life hours to tame a T-Rex if you do everything right, and it could take as long as TEN HOURS if you do it wrong. Ark is a good game, but it's default settings do not respect your time. This is going to be a long post, but if you're new to the game and you want to play on single player then you'll want to see this information.
Go here for the renewed version of this guide.