Then again, a person with whom I went to college is a recognized expert on Oracle performance. I find it keenly interesting that such a role even exists.
I look at startup-ey, Webby looking job postings and it's like the qualified people drew to several consecutive inside straights just to have the right buzzwords on their resume. And it's a different set of inside straights than it was six months ago. And it's different yet from firm to firm.
See there how easy it is when you don't know what you're talking about? :)
OTOH, I recently had an interview at a company who have quite a bit of groth and scaling problems right now (but probably not Silicon Valley level), and they still said: "We constantly have to learn new things, so the most important thing a candidate has to have is they have to enjoy learning new things".
AND: there are quite a lot of companies who are in the stable / profitable / predictable growth category and could afford to train/develop their people - But don't.