For any company to have a decent shot, they will most likely need a total reset. Everything they have been doing so far needs to be re-assessed based on it's ability to be measurable, scalable, and effective in terms of attaining growth. They will need: training, coaching, new mindset, skills, tools, and routines. And on top of that a zeal and passion.

Forget any assurance. If someone gives it to you, it's most likely bogus. That's why I said "decent shot". Doing this for one established company alone is difficult, for 100 something extra-ordinary. Whoever does it will probably need to re-invent themselves in the process, and find a way to scale themselves as Growth Hacking as a Service.