Stress is a fctor I have witnessed first hand with an arrival of a male Spider. His first feed he twirled all around and swallowed the rat from his back but once he settle in for a week or so he don't eat that way anymore at all. He is fairly normal so to speak in the feeding department but still has a pretty bad corkscrew. He does miss strikes due to the wobble and has even gotten my finger on a miss cause he strikes like sideways. As far as getting better with age and weight, I was told it entirely depends on the snake and how extreme the wobble is. But I may be wrong and hope to be for my spiders sake!! I hope he gets better as he grows and gains weight!