J unaware of PJ

There's been a bit of a fluster over Jessie J's revelation she doesn't know the work of Polly Jean:

When asked to comment on PJ Harvey’s win, the ‘Price Tag’ and ‘Do It Like A Dude’ star confessed that she’d never heard of her, but vowed to explore her back catalogue after the interview, asking, “Is she good then?”

Is it really so surprising that a 23 year-old didn't spend a lot of time listening to classic era John Peel? I'll bet she doesn't know who Silverfish were, either.

Wasn't the point of the Mercury when it launched - alongside promoting the now-defunct Cable And Wireless domestic telephony service - to introduce people to music they might not otherwise have come across? Isn't that job done?