When browsing the site using Firefox, everything comes up instantly, where as previously stated, in IE7, the banner loads, then the page comes up 20-30 seconds later. I've also run into some issues with posts being dropped, or buttons on the site not working in IE7. I've checked over my security settings, and nothing should be scanning, checking, or otherwise delaying the display of the site. Possibly some unnecessary code for us IE users?
My friend is a web page designer, and he said it is a lot easier writing code for Firefox than it is for IE, so maybe it has something to do with that. I have the Adblock Plus add-on so I forget that there are ad banners until I go on other computers and they pop up.