We did - had delivery March 14, which was a MOnday, so I don't know about Sundays.
We checked in about 4:30 pm and then went to our room (at CSR) and then straight out to dinner (O'Hana), and only then did I remember that we didn't ask for the tickets....so I was a little panicked but when I went to guest services about 10pm they were able to retrieve the package for me, full of brochures and mags with coupons and maps, etc - and the tickets, phew.
I mention all this to say that the Disney CMs don't necessarily tell you that the package is there waiting, or at least ours didn't - but it did make it safe and sound.
AV