You're all spoilt rotten. I have 2 mbps adsl and I consider myself lucky.
But your complaint is latency not bandwidth. The actual bandwidth used by RHP is probably in the low kbps. In other words, for the same latency, 500kbps or 75mbps will make no difference whatsoever.
But if RHP is slow for you its probably on the server side. Either they need better programmers to optimize the code, or they need more/faster servers. Either way, it would probably mean higher subscription costs. What are you willing to pay for faster response times?