@CrouchingBruin - Thanks for the feedback.
I'd like to see more layout options myself. So far I have been creating my own responsive CSS and simply pasting them into clearfix.css section of the Montezuma's interface (that way it would overwrite and ignore anything set in the responsive grid section). But I don't like hack solutions - I have been thinking that one of the later iterations of the theme should address that as well - as in allow users to choose between a 100px & 110px-based columns, as well as add their own custom responsive layouts, should they choose to do so.
But that's a thing to work on after the theme is out of beta.
@beatrixwilliams - I myself didn't. We have a dev that did it on our behalf. He knows about this thread, so if you have any feedback regarding the current version, feel free to post it here (include as many details as you can - WP version, screenshots, etc)