Hi Sarah,
If you use a feature image greater than 50K in size, each time the post loads, it's adding that plus the minimal file size to the local computer of your users/visitors. If you're adding images of 2Mb plus for multiple posts and then attempt to use a product like Post Pins, which pulls the feature image, then who ever visits your site will have a tough time loading the page.
In Dashboard > Settings > Media, you must have increased the default size from 2Mb upwards and increased the size of the feature image (thumb). This is going to crash many a visitor's browser by using up available memory, resulting in people not returning. I have tons of memory and still your page takes quite a long period to load.
If you test with Pingdom.com, you'll see that your site itself loads in under 1.3 seconds. The rest of what you have in the page... particularly the images, bring the load time into hundreds of seconds. Currently, it's counting at 950 seconds and going
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Yes that's more than 13 minutes. No one would wait for any page to load more than 2 minutes, nevermind 13 and counting.
I'd suggest editing each image. Create one for the post content area of no more than 1200px wide and one for the thumbnail no bigger than you need for a slider, but only if you use slides based on categories. If you don't, then make your thumbnails 400px square and no bigger. You really will cut load times like that. Make sure you don't make the thumb more than 250px square viewable.
You'll need a graphic editor, but rest assured this is the best solution. If you look in IE, you may even see that your feature images inside posts don't resize, breaking the site.
So, your solution is clear. Resize each image. Create a thumb image separately and reload.
