It’s the difference between “What’s the best we can do within the constraints of the current ePub spec?” versus “What’s the best we can do given the constraints of our engineering talent?” — the difference between going as fast as the W3C standards body permits versus going as fast as Apple is capable.

Apple’s concern is not what’s best for the publishing industry, and it certainly isn’t about what’s best for the makers of (and users of) rival e-book reading devices.

Want a well-put, wrap-up analysis for the Apple’s new iBooks Author app? Look no more.