Actually, I'm not saying you'd benefit more by taking 6 over 12.
12 would provide more uumph, but for me, 6 a day spread out over two weeks worked well. I was not interested in pure bulking. If you want to spend the money, and workout accordingly to get the full effect, 12 is great.
6 provides ample benefit in my opinion.
As far as taking them all at one time, I just think I remember reading that that is the correct way to take the product. As far as a.m. versus p.m., I don't know that it matters. Just take them all at once