Well, since you seem reluctant to provide an example, I'll try it with a question:
Did Myspace have growth hackers?
Reluctant to provide an example? In my comment above I said that all the companies at the conference were examples of effective growth teams.
I suggest that we respectfully agree to disagree.
Except I didn't ask for "effective growth teams" but for instances of successful "growth hacking" (where the conclusions were not utterly obvious to begin with).