The list took me almost 13 seconds to load (I copied it to myself), so my estimate of 1-5 seconds was a bit off. What happens when it fails? Don't you get the grid at all, or is it just empty? If you get the grid footer, you can the select box from 100 to 1000. That will reduce the load time to less than 10%. Takes me less than 2 seconds if I set it to 100.
If that doesn't help, could you screenshot how it looks when it doesn't work? Also, what web browser are you using?