I wondered the same thing as my GE FF boldy hilites Heavy Duty on its dash.
On a similar note just last night I was flipping thru the Sears Fall & Winter catalogue (Cda.) where it appears that most if not all Kenmores at least are EXTRA-LARGE CAPACITY 2.45 cu.ft or SUPER-CAPACITY 3.2 cu.ft. I guess small and regulars need not apply.
I will scan some catalogue pics soon as I get my scanner to be recognized by this PC. OY!