I dont think it is all spiders. I have a breeder male and 2 of his offspring from last year and have genuinely never noticed any wobble. A wobble free spider was important to me when I was looking to buy one. They have perfect aim when striking as well. There are many that have a wobble and it's nothing to worry about but there are those that dont have one. I'd hold out and find one that doesn't. They are out there.