It does annoy me a bit as a seller because I'm usually pretty flexible and sometimes allow bidders to combine items over a couple of weeks.
I've gotten reliable bidders who are pretty annoyed and thinking I'm sending them constant payment reminders, when it's really Ebay that's sending them out without me knowing it.
On the other hand, I've gotten more non-payers and really late payers in the last year, then I've had in the previous 10 years combined because of Ebays newest policy changes...................so, who knows what's right anymore.