@ Patrick. Thank you for the references! I'd seen most of those, but actually had not even thought about looking for videos specifically about milking mini Jerseys before.
@ Kelly. I do plan to call/email the breeder who claims the 2-2.5 gallon a day, and ask a few questions, I'll let you know what I find out. And, yes, I'd always understood that weight/size contributes directly to how much milk is produced, which is honestly why I was a bit skeptical.
@ Hunter. And yes, I do get that they are just very small Jerseys, but since they have their own breed registry and own bloodlines, separate from the normal breed, I've just been calling them a separate breed.