A 7MB png on that page (4418x3206) - that'll be the first thing I want to block…
Here I fixed it for you http://s27.postimg.org/pupcpnbkh/focus_blog.jpg
And it's still 7x larger then it needs to be.
This is not a website you're going to visit regularly, or probably even more than once (except to show all your friends how badly optimised this image is).
Based on this logic, I probably shouldn't have bought the car I have now, because the brochure was printed on really thick paper.
Yes. If you can't judge an app based on its website, why would anyone make a pretty, usable website? Its trivial to downsize that image based on browser or os.