As with most questions, it probably can't be answered as simplistically as yes or no. The answer may very well be yes in the current environment. But that environment may be a result of intentional and unintentional decisions the company has made over the years whereby they have become less reliant on individual talents for many aspects of business. That's very much the case with the Network, where no individual is moving numbers.
What if they made different decisions regarding developing and pushing talent? What if tomorrow they changed their priorities and got away from generally highly scripted promos? What if TV viewing habits, DVR, cord cutting, smartphones and all other technologies today weren't around or were present in different combinations? Would someone break out of the pack in a way that others haven't? I don't know. But all of this fosters a state of the business today where certain metrics mean more than others did during different eras not that long ago, or at a minimum have very different relative weightings in such an analysis.
I'm not sure what the answer is today or what it'll be in 3 years. But the process of thinking about it will constantly shift based upon decisions by the company as well as societal/content consumption changes.