OHHHHHHHHHH yes i have expirienced this
They are not snappy what so ever,it's all down to the breeder and how often youngsters are handled.ALL mine(save 1) are dog tame and will jump on my hand or arm when i open the viv door.I do have 1 female that spent the first year of her life in a pet store and she wouldn't hesitate to give a bite.These also get lock jaw and shake their victim if you get one that hasn't been very well handled,a bit like a pit bull does
So i do have just the 1 fiesty girl.All the others are just as tame as the most friendliest of my beardies.