One of the more interesting debates in the always exciting world of market research has emerged from the surprisingly heated exchanges between 
Duncan Watts and Malcolm 
Gladwell. The issue in question is whether the much-touted category of 
Influencers really exists, or more accurately, whether so-called influencers are any more influential than any of the rest us.

The question of the 
influencers' real marketing power wouldn't matter so much if it wasn't central to the whole best-selling 
Tipping Point thesis and the foundation of innumerable  costly marketing  efforts.  As the challenger, Watts is the crankier of the two contestants, calling 
Gladwell's thesis a bunch of crap, if only because it never explains the "mechanism" around which the 
influencers manager to influence so many people.  For the 
Influencer thesis to be true, he asks, wouldn't every person the 
influencer touches have to become magically transformed into another influential?   
Gladwell, as the reigning champion, is more circumspect or generous or just too rich to care at this point, and suggests we all are just seeing  part of the great whole. 
The whole debate was covered with some depth and acuity 
here in the February Fast Company and it's worth spending some time with for a couple reasons.  One, it's just weird that a qustion in market research  is the center of this much 
controversy.  Two,  it suggests how powerful intuitive theories like 
The Tipping Point can be, even if they happen to be wrong, though the jury certainly is still out on this point.  E.g:
 Why didn't the Influentials wield more power? [Watt's speculates about a simulation he created] With 40 times the reach of a normal person, why couldn't they kick-start a trend every time? Watts believes this is because a trend's success depends not on the person who starts it, but on how susceptible the society is overall to the trend--not how persuasive the early adopter is, but whether everyone else is easily persuaded. And in fact, when Watts tweaked his model to increase everyone's odds of being infected, the number of trends skyrocketed. 
 "If society is ready to embrace a trend, almost anyone can start one--and if it isn't, then almost no one can," Watts concludes. To succeed with a new product, it's less a matter of finding the perfect hipster to infect and more a matter of gauging the public's mood. Sure, there'll always be a first mover in a trend. But since she generally stumbles into that role by chance, she is, in Watts's terminology, an "accidental Influential."
Turning away from the fascination with  new media magic and the (seemingly free) power of 
WOM, Watt's takes us  back to the right message at the right time.  Certain ideas fly around so fast less because they are implanted in the 
smartphones of the well-connected than because they are good or at least culturally resonant ideas.
To me, it seems likely that they are both wrong, at the extremes. Most of the time, fast-talking hipsters can't save an irrelevant idea any more than a resonant idea will necessarily circulate itself.  And both perspectives are valuable, as they offer two useful views on the social life of information.   But at the moment, Watt's is more fun to read, if only because his arguments are 
fueled by the ferocity of a born spoiler.   Hard to believe it, but this might be one argument worth following.