I dont think slinkey is having a go at you in the grass, I think they are just trying to get a variety of info.. No such thing as a dud snake. Slinkey you should leave it for a week at least or even a bit longer before trying to feed it, a couple of days is too soon after relocating it to a new home to try and feed it.
There is such a thing as dud snakes, they are either gentically rubbish or have had environmental problems such as incubation problems. They should be culled, but some sell them on to ignorant buyers for quick cash, hence why such a post can damage ones reputation. The only thing that hopefully prevents damage to the sellers reputation is the apparent lack of experience of the person who named them. Im not saying they are trying to slander but it can come accross that way. It seems that they had no intention of slander, so hopefully its just a storm in a tea cup.
Reptiles are individuals as well as being a range of diverse species, i have had reptiles feed within 10 minutes of being out of a bag after flying across the country. I have also had a MD carpet try to bite defensively after being transported.