The only technical crit I have is that it doesn't scale and recenter when you turn your iPad from portrait to landscape.
I work on a website that does a similar thing. Turns out that there is one line of text, all the way at the bottom of the page that runs longer than the rest so the browser centers the page using that line, making the rest of the page go off center. I'm not certain that your site is doing the exact same thing but it's probably something minor like that.
Thank you for your feedback. I will have a close look on the ipad scaling/centering problem. Not easy to correct without an ipad! I will have a look on internet to see if a Ipad web emulator does exist.