Unfortunately no mention of prices, so increase in portion sizes might be below inflation; and I suspect the former could be a strategy of compensation for inflation by making it seem less drastic ("yes it costs more, but we also made it bigger!")
One time when I was a kid and my dad and I were in line at Fuddruckers, we overhead someone else in line say "I don't think I could eat a third of a pound, so I'll have to get a half a pound instead. It's still a reference we laugh about over two decades later.
