This is quite surprising to me. I know that Pete Hunt -- one of the authors of ReactJS -- and one of the main proponents of using it in conjunction with Flux, gave a talk at Meteor Devshop 11 earlier this year (http://youtu.be/Lqcs6hPOcFw?t=48m7s), and didn't say a word about the problems associated with two-way data binding. To me that would seem to be the elephant in the room. Is that because he treats Meteor as a framework for prototyping and smaller scale apps?