Would have to agree with you Dan,
I spin out at how much the whole flavour profile can change over a few days. That last Peru we got the other day is a good eg. I roasted it to about 10 secs into second and then let it rest for ca36hr. When I pulled a shot the aftertaste was very strong and quite unpleasent. 24hrs latter, yum!
Glad I didnt chuck the whole 2.5kg which was my first thought.