PetraG:
I think the article was aimed at people who had been poorly catechized concerning what it meant to meet their Sunday obligation.
As far as I know, there is no church requirement that you need to stay to the very end of the Mass in order to meet your Sunday obligation.
Canon lawyers differ on this issue. I’ve read that Ed Peters blog before, it’s on the “Greatest Hits” list for everybody who carps about people who come to Mass late or leave Mass early.
Your Mass attendance, including whether you’re early, on time or late, and whether you leave early, on time, or last one out of the church because you were praying right up till the sacristan threw you out and locked the doors, is between you and God.
As much as people would like to enforce some “rule” about “if you weren’t there for X then you didn’t really attend Mass”, there isn’t one, and it’s not enforced.
I have better things to do than get upset about when people come and go from Mass. The ChurchPop piece and Ed Peters piece and so forth are meant to encourage people to stay for more of the Mass, which is fine, but that’s not the audience on CAF. Which is, I think, what you said also Petra.