That's what it is. During the foil stage you will want to add some liquid, you can use apple juice, beer, soda, BBQ sauce, butter or anything that sounds good to you.
The 3-2-1 times are just a good starting point, you might want to tweak them a little for your liking. The longer in the foil will make them a lot more tender, fall off the bone, if you want a little more tug then cut back on the foil tme and add it to the final stage.
The good thing about this is you get to eat a lot of ribs until you find the times that fit your tastes just right!
Would you do us a favor and add your location to your profile, sometimes it help others answer question if they know your neck of the woods, Thanks!