I guess it was at least a little apparent a while ago. I remember way back in the thread someone saying they saw Jack Jr and Brianna at the used bookstore trying to sell back some books, and Jack Jr was arguing with the cashier about the value.
Well, Brianna does have a job too, I'm pretty sure.
I actually think that for someone his size, it's kind of early for a plateau. The problem is that he's never truly gotten serious about counting and restricting the calories. He's mostly just been eating with a vague sense of "healthier versions" of what he'd normally eat, without regard to exact calorie counts and portions. It probably does amount to him eating fewer calories overall, hence the [alleged] modest weight loss, but if someone his size got serious about calorie counting and making 100% sure he's actually only eating 1200 calories per day max, I think he could lose upwards of 80 lbs before he hit a true plateau.
My thought is, he and Tammy are roughly the same height and in my opinion he looks like he weighs more than her. Tammy's fat, yeah, but she's not shaped like a goddamn bowling ball. That could come down to a difference in how men and women carry weight, though, and the fact that Tammy doesn't have the luxury/curse of a completely sedentary lifestyle because she actually has to do stuff during the day.