iAd is a big part of Apple’s iTunes Radio business, with music rightsholders sold on the idea that Apple can generate meaningful mobile advertising revenues, as well as upsell users to iTunes downloads. But for some blunt perspective on just how effective Apple’s iAd business is, read AdAge’s feature ‘Why Can’t Amazon and Apple Catch a Break on Madison Avenue?’ which doesn’t pull its punches. “Media buyers say they are slow, cocky and downright stingy. Both take too long to develop ad products. Amazon’s sales approach is too pushy; Apple is too reticent to foster relationships. Most frustrating: Neither is willing to cough up enough of the consumer data that attracts advertisers to them in the first place.” The latter point appears to be advertisers’ key gripe with Apple – one exec tells AdAge that its refusal to share more data makes it (in a paraphrased quote) “the best-looking girl at the party, forced to wear a bag over her head”. Ouch.