The congregation can't tell unless the cleric has a longer neck. Isn't that half the fun? I used to only wear them for giving academic presentations but I've found some of the low church Lutheran churches I've worked with are comfortable with the look.
This was in the course of the principle Sunday Mass. However, the parish has a bishop in residence. I had packed several things with the intention of deferring to his preference for my vestment. He rather liked the tabs, as the parish is very Anglo-Catholic and he thought they had probably never seen them before. I was also wearing a zuchetto since he liked head gear but I don't own a biretta.
I think you would find the parish quite interesting. It was begun under the auspices of the Province of Christ the King. More recently it had been under oversight of the Diocese of the Holy Cross. It is now an independent Catholic parish. Though 40-50 in number, the music was exceptional. Paid organist, cantor, and a robust choir not afraid to sing in Latin. My daughters have seldom heard more than a line of Latin so when we sang a whole chorus in Latin they were quite fascinated. Also, most of the women in this church veiled. There was a mother with her 6 daughters and she had all but the youngest 2 veiled (probably 4 and an infant). They are ordinarily an Anglican Missal parish following the 1549 Canon of the Mass but had pulled out a 1928 Altar Service Book for that Sunday to simplify the celebration for a relatively new priest who was also attending the conference and who the bishop wanted to work with personally on celebration. So the celebrant was vested in alb and chasuble, the bishop vested as a priest assisting in surplice and stole, and a third chap (who was also a priest) vested as a deacon and read the Gospel. I preached and served as crucifer. The recording was not up yet last I checked but Bp. Cumming said he has the file.