Its true some people might be more impatient or more of a perfectionist than someone else in expectations. But that's where the "pattern" comes in. Say 5 different people have had some manner of bad experience with a particular individual that kinda eliminates things like "oops", "the mail did it" and someone being a little too impatient.
Problems do often arise that we don't expect. The ceph I offered up in the auction ended up getting scale before the auction ended. I'm now trying to clean the plant up while my VERY patient recipient waits. But have been and remain in contact about the plant. I'm working to fix the problem.