80/10/10 means an average minimum of 80% carbs, an average maximum of 10 percent fat and an average maximum of 10 percent protein. (and If you go over 10% fat or protein some days it's not the end of the world either)
5% protein is very average and perfectly acceptable assuming you're consuming sufficient calories
hope that helps a little!
As long as you consume enough calories you will get enough protein.
excellent talk here 5 minutes in on protein...
You don't need to worry about protein unless you want to gain weight and bulk up, otherwise just keep eating and you'll never need to worry about the big P
You really have to give a fair trial to one way over another for at least a month at a time to see how you personally respond. Increasing calories is the easiest and most sensible thing to do when increasing your activity and trying to gain muscle and it is what usually works for the vast majority people. There are a few people on HCRV that feel best on 15% fat and some of those people are body builders. If you decide to try a protein supplement, I would just be careful of not taking more than 15%, as protein can be very hard on the system, and I would be very careful of protein supplementation sources, many have heavy metal contaminants. Here is an good thread on the topic.
From what I understand so far, especially if you're trying to bulk up, that 10% is important. Honestly, I would make it a priority to make sure you get at least 10%. Last night, I had a super active day at work, and it wasn't until I took in just a bit of pea protein with my post workout fruits that I felt completely satiated, and my body calmed down from the shakes I normally get after a workout. Protein's function is to sustain what you build, so my guess is upping intake just A LITTLE is probably a good idea if you want to bulk up... Not just for all of protein in and itself, but the free form amino acids in protein sources help to contribute to everything going on when you're transforming your body.
So ah..bulking up: Lots more carbs and fat, a little more protein when you feel you need it.