BD's always loaded a little slower for me than other similar sites, but as I've often said before, that's because of my connection (I can only login from office OR sometimes from a phone if I have data). I've long ago cut my home connection as can't afford extra expenses and since I live at my work practically, I just go home to cook and sleep.
That said, lately, since the last 2 improvements, speed has improved noticeably. So I'm sure, it's a connection issue (your ISP).
These network issues should be addressed first to your ISP before seeing if it's BitDice's problem or not. As usual, just like me, I don't have a problem accessing the site and I know that my internet is quite good.
Yeah, when the network is coming out of just one place to tens of other computers (in some companies even hundreds and thousands) it becomes a bit more slower because of two main reasons.
One is you do not have individual internet for one computer, normally at home you either have just a single computer with internet or you have two, rarely more but even the biggest households probably has like 5 phones and 3 computers and all that, yet when you are talking about a company they are sharing the internet with tens of computers which makes it slow down, they might get a lot faster and a lot bigger internet so they can share accordingly but we all know companies tries to cut corners on costs wherever they can find, internet could be one of them as well.