Perhaps off topic — but that forum was maybe the slowest load wise what I’ve even seen.
It could come from distances, proxies or something else I can’t even image. But if the reason came from the forum itself, what would be the potential reason? Used font? Amount of images?
The reason to wonder that is quite simple: avoiding the biggest risks, and I’m thinking change fonts 
Or is this impossible question because of lack of data? Or because slowliness (is that even a word) can be a personal thing.