A very interesting interview with an ex photographer's rep, Julian Richards, at Photo District News (PDN) - money quote:
"Digital changed the landscape...Suddenly many jobs can be done by many people, photographers become more interchangeable, the question of "Why him over her?" shifts to ancillary aspects of the process; personality, speed, stamina, flexibility. And there’s profit in mutability; being able to gather several photographers under a single umbrella with a shared mandate makes you more flexible and attractive. But the corrosive byproduct is that the unique sniper's eye of a Greg Miller, Chris Buck, James Smolka, Sian Kennedy becomes not only less relevant, but actually an obstacle. In shifting ground to garner a larger share of the mainstream, you risk losing identity, licking the hand that feeds you."