i think parcel post is slower.. usually estimated 2-9 days, depending on where it's coming from and destination. it's also cheaper, of course. do you mean "regular mail" as in priority mail? priority mail is 2-3 days usually.
No-I know priority mail is 2 days and that is how she usually ships things to me-but, she wanted to save money this time.
I mean regular mail vs. parcel post as in, regular mail you drop in the mailbox and say in this case, from California to NY, it takes maybe, 3-4 days as opposed to paying even less to ship and it taking longer than, well, regular mail would-LOL! Does that make sense?
I asked our postmater about this. Parcel Post can vary. The USPS waits until a truck for one of their major destinations is full then it goes out. So it can sit on the truck for 1 day or a week. You never know.