My N=1 tells me that the bit about only absorbing so much protein per meal is bunk. I often eat only once a day, and add muscle easily. Granted, there a plenty of explanations for this. My body might be building muscle, but not directly from the excess protein. Or the HGH or fasted state is modifying my body in ways that I don't understand yet. But I think the most likely explanation is that, because I eat all my fat and meat together, digestion is slowed enough to fully digest the meat. When I first went paleo I remember pooping whole chunks of steak and puddles of grease. Then I adapted, and I actually break it all down now.
So spreading out the protein to three meals is not necessary for everyone.