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Marco Arment talked about this in some detail on Build and Analyze a while back. (Can't look up the EP number right now unfortunately, sorry)

• jcurbo 14y ago
  Ok, I had time to check and it was apparently this ep. http://5by5.tv/buildanalyze/93 http://5by5.tv/buildanalyze/93
  • samdunne 14y ago
    I'll have a listen thank you :)