An initial read on the Catholic Come Home (CCH) advertisement push by Mark Gray at CARA:

Did Catholics come home?  We have no Mass attendance polling or headcount data. Yet, it is clear by some measure that the national Catholics Come Home (CCH) television advertisements had an impact in December. Evidence of the number of Catholics seeing the CCH videos, connecting with the CCH website and then some following through with seeking out parishes and Masses jumped up last month.

via Nineteen Sixty-four: New Year, A Bit of New Research.