That's what I am wondering. I don't think corn-fed and wholesome sells any more, or even pretty.
Now you're scaring me. You're beginning to sound like Mr. Potter of Bedford Falls

.
Joking aside, my view is not that corn-fed and wholesome doesn't sell; it's that it's no longer the
only thing that sells. There is no question that a wider range of traits, in looks/ethnicity/personality/etc. are now potentially marketable, reflecting the more diverse composition of America since George Bailey's day.
The following are some random thoughts addressing the interesting and stimulating points of view of the various posters who have commented on this question, including Mathman, golden411, Olympia, karne, heyang, louisa05, and others:
IMHO, the combination of corn-fed/wholesome etc. etc. with a ladies figure skating gold medal will be a huge marketing draw, even in this age of audience segmentation. I will even suggest a parallel from Simon Cowell's parallel universe: Jackie Evancho.
Just a couple of weeks ago, I was watching Susan Boyle's videos on Youtube for the very first time (I'd never heard of her before then; but that first audition vid for "Britain's Got Talent" was astounding, and, I admit, emotionally affecting). She is the poster-child for the "We Are the World", politically correct idea that there is no limit to the type of diversity that can appeal to audiences.
While exploring the Susan Boyle phenomenon, I happened to see the links to Jackie (who I was also learning about for the very first time; does that sound unbelievable?). I watch these kinds of TV shows only rarely, and have never understood the appeal of the vast majority of so-called winners, but these two were, for me, genuinely interesting. Susan for the back-story, and Jackie because she is the very definition of precocious talent. I mean, at first I thought she was a twenty year old with a hormonal disorder.
Anyway, the point is this: I understand now that Jackie has become a breakout star. Certainly her vocal talent explains much of her success. But my guess is that her doll-like (and blonde; I don't know whether it's natural or not

) looks, and squeaky-clean, wholesome image were also a key contributor to her appeal and success.
The marketing archetypes that a Jackie Evancho or a (hypothetically OGM-winning) Gracie Gold represent are still, I think, very much alive and kicking, and to dismiss this is to fail to distinguish between the pragmatically diagnostic and the normatively prescriptive.