It does appear that you can zoom - sort of - in the M96 stock reader by pushing the D-pad north or south, but it actually reflows the text rather than zooming. It works sometimes, and other times (e.g. with tables) it just ends up being a mess.
In ezPDF you can double-tap with the stylus on a block of text or image and it will zoom it up to screen width (with an animation that looks like a bad acid trip on e-paper
). Having to use the stylus bugs me, but maybe I'm in the minority on that one.
Can I interest you in an almost-totally-unfair comparison?
https://www.youtube.com/watch?v=MKd-LIBlwg8
It's from 2011, but the specifications aren't really that far off of those of the M96. Just an example of what should be possible with proper software-- e-paper rendering speed aside.