Is it just problems with the Pprune site or with all sites. It could just be a bottlneck with your ISP or just a busy time on the internet. Remember that although they are fairly accurate, the progress bar at the bottom of the browser screen is not an exact thing. It might race to 90% then sit there but in reality it might be less than that and it is just a slow process to load the page, not just the last bit.
BKN.