Yes in so far as the search engines look at things like file size, page load times, etc... But a large amount of images also give you several SEO advantages like img file names, alt tags, etc... The biggest thing you need to pay attention to though is that you don't use your keywords in your images, always make them text or your wasting your time, always optimize your images for the web, and pay attention to layout so your page is laid out in the following order usability/SEO layout/artistic design (which is different than good graphic design) SEO layout is basically the SE only read the first 350-550 words on a page, so don't create a layout where a bunch of junk comes before your real content. Hope these basics help