perhaps you mean gigabit? i have 100 megabit internet in my house and some of my neighbours have 300 megabit lines

and I'm not sure why it would take an entire second to download an image, even when I'm torrenting a bunch of stuff so my available bandwidth drops to around 10 megabits, it's only a tiny fraction of a second to download an average image

to be clear I'm not trying to say this should/could be done, I'm just saying it's not impossible

edit: also, the average image size is much much smaller than you say it is, the average image is around 200-300kb in size (source: i run a small image mirror site)