Another angle is as discussed in Mythical Man Month - due to O(n^2) growth of communication overhead, the optimal team size is 2. 2 people working 100 hours a w

Another angle is as discussed in Mythical Man Month - due to O(n^2) growth of communication overhead, the optimal team size is 2. 2 people working 100 hours a week >>> 5 people working 40 hours a week, as is obvious in any early stage startup.