This time won't be different.

Here's the # of times it's "been different" - 3

Some more wisdom:
Agencies don't know your company as well as you do
Agencies cannot, by definition, focus on just one customer
Experts often don't know shit
If it's important, you should figure it out yourself!

So you didn't listen to the golden rule, eh?

Yup, listen to the golden rule next time.