Let's say you're a decent performer for the past two years (right out of undergrad) at a pretty good consulting firm (not MBB). Culture of the current firm is shifting and mostly not for the better. The partner you are under leaves the firm along with a few other higher level people. Later you find out it's to start a boutique consulting firm doing very similar things. A couple months later, you get offered to join his tiny firm of <5 people. Pay is better and you probably will have more responsibility. Let's say they only have one big contract in place. Would you do it?