The focus groups were likely made up (mostly if not completely) of democrats. They're unfavorable toward republicans by nature, and their idea of economic growth is through government spending and largess. They'd naturally be against any spending plans that don't grow the government, and likely favor increased stimulus spending. Nor will they ever consider an alternative. It's just not possible.
Paul Ryan was on “Fox & Friends” this morning responding to recent attacks by Obama. He pointed out the absurdity of calling something a “cut” when you are just not increasing it as much as someone else wants to.