Don't you think there's a difference between shipping delay caused by a lazy seller and shipping delay caused by the Post Office?
Thorsten had every right to leave negative feedback, because not sending the record for almost two weeks is just not on. Period!
I had some very lazy sellers myself during the last few months, e.g. time gap of 2/3 weeks between receipt of payment and posting of disc. Was tempted to leave negative feedback. I didn't eventually but I wish I did.