Very cool site! I see a little big of the chug you're describing. I took a look through some of your images perhaps you might want to reduce the size of some of them as iPad can have a hard time with large images. For example, http://www.soyouneedagraphicdesigner.com/images/yuppie_retina.gif is 1600x600px. In this example you might want to consider cutting out the character graphic and placing at a smaller size.
For what its worth, the lag wasn't noticable enough to me to think your site looks any less awesome
Thanks Sarah, im chuffed that you like it!
I will trim the images down in size as you suggested, hopefully that will help.
Does using the 'publish' command reduce the file size at all?
All the best.
Publishing helps with the filesize, but only for the JS files (in the difference of kilobytes). It doesn't compress your images, which I believe is the culprit here.