Two things:
1. Apple is one of the few companies that actually almost does not do any market research.
I'll be sure and tell that to my colleague who was a product engineer at Apple who, even as a technical person, was involved in Apple's market research. The very first thing Steve Jobs did when he returned was he killed many of the dead projects that weren't marketable and re-instituted a model of product development that involved introducing feeler products to gain feedback from consumers, analysts, vendors, developers, retailers, etc. as to what they like/dislike and then set in motion 2-year product cycles that ramped feature sets in from the feedback gathered from this heavy market research.
If anyone goes to tremendous lengths to understand what consumers actually want and then shapes their products and features around that demand, Apple is a leader at this.
I think the misconception arises in wanting to believe that Apple just designs cool stuff with nobody's direction but Steve's, and that somehow this is more implicitly noble/ethical than "evil" marketing guys just trying to figure out how to reposition Jello. Apple DOES marketing research, and they do loads of it... the difference is that they're not just trying to figure out how to re-brand refrigerators in Alaska... they're actually sending out engineers to understand how products are used in the real world, and what people like or dislike about them, and what other features they might want to see... and they do also take their consumer feedback through online and retail channels pretty seriously.
Hell, they even have one or more people at Apple retail stores monitoring user activity on their floor models from behind the scenes so they can understand how the average consumer interacts with their products and features.
Apple has some of the most impressive product development roadmaps guided by market research so robust... That, and not simply Steve Jobs' good looks and charm, is a huge component of why they manage to stay ahead of the curve... why they introduce products at the right time (AppleTV product development coincided with a projected surge in HDTV sales)... and why when the public was scrutinizing iPhone which isn't even out yet, Apple is already focused intently on products that aren't due for another 1-2 years but are driven heavily by current market research that shows a big uptick in mobile internet access usage.
2. Apple has had almost no raise in cost per song by the bitrate change. I would say $.01 if I were to exaggerate, so why again are they charging $.30 more?
This is simply false. Maybe you're confusing the difference between fixed cost and marginal cost, but there is an increase in at least marginal cost. For each EMI tune the storage requirements triple... They store the 128Kbps file, PLUS the 256Kbps file for each song. Some of the fixed costs included updating databases and front-end UI to incorporate the new content on Artist/Album pages dynamically. Then there's additional marketing costs, yes they will actually spend some money advertising the new content and the money to do so doesn't magically fall from trees... they have to budget it.
Transcoding the 256Kbps files from digital high resolution masters also eats up processor time... That's a measurable per unit cost as well. And don't assume their finance people are sitting around watching YouTube instead of calculating these things.
Apple is still very much a business... they're a radically innovative business but they're also a smart business. Steve Jobs positions them as this outfit that oozes magic but the reality is that his statements are backed by keeping his finger on the pulse which means doing calculated market research and not just making vague Nostradamian shots in the dark.