Quote:
Originally Posted by Amazon
We chose a format that we felt would give us better performance and superior ease of use.
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No, they chose a format because they had previously bought it. From Wikipedia:
Mobipocket.com was bought by Amazon.com in 2005
EPUB became an official standard of the International Digital Publishing Forum (IDPF) in September 2007
Quote:
Originally Posted by Amazon
Because we control our own standard, we can develop applications that let customers read Kindle books on the iPhone, Android tablet, iPad, BlackBerrys and PC.
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Well... it's not false, but they can develop applications for any open format too, they do not need to have their own format for that.
There's obviously no real connection between "proprietary format" and "faster software", unless it means "faster than others at reading this proprietary format". About whether Mobi is faster than ePUB, it might be, but because it's a simpler format (and designed for simpler devices), not because it's proprietary. The Kindle would be even faster if it read only TXT files.