How do you connect to the net? I have a USB broadband thing. I've had it happen several times. I find that if I close my browser, sign off the internet and unplug the USB thing then start all over again it goes back to normal.
I would thing that just closing the browser if you're on a DSL or cable then starting over would help. Can't hurt.
I notice that the site is slower on the weekends and significant days. Since today is Mother's Day, there are probably a lot of extra users out there. Good luck with your download.