I think the figures we have for how many Catholics voted for Obama in 2008 are from exit polls, which aren't all that reliable. Anyway the figure was just barely higher (one or two percentage points, I think) than for the rest of the population. If you exclude Christmas and Easer only Catholics, probably McCain got a higher percentage than Obama. (Of course Obama shouldn't have gotten any votes from Catholics at all given his record on abortion.)
My guess is that among Catholics who go to Mass regularly the only groups that gave Obama significantly greater support than he got in the country as a whole would be Hispanics (other than Cuban-Americans) and the bishops. Maybe priests and nuns too.