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).