I'm one of those that abhors the Playskoolization of professional services (I don't fit in to that culture myself), don't buy into marketing and am not easily moved, but having sat through a ton of sales meetings from vendors that take both the infantile as well as the more traditional "adult" approaches-- the latter always comes across as cold and sterile, like we're just one more sale they need to make quota.

Product viability being equivalent, the decision comes down to "do I want to do business with some hipsters and their dogs, or do I want to do business with the Borg and their lawyers?"

The human approach still works.