I'm assuming that you mean 50 KB/sec (bytes, not bits, right?).
I get around 80-120 KB/sec at around a 100 ms latency (or 600-960 kbs). My raw dreamhost speed tests are 5 kbs down, 4 kbs up. My raw connection here at work is 100 mbs symmetric, though I mostly don't see more than 25-30 of that - dunno if it's load or the proxy.
I have seen several people post with some concern about their 50 KB/s upload speeds.
Free unique IP and $67 off with code [color=#CC0000]LMIP67[/color] or use [color=#CC0000]LM97[/color] for $97 off. Click for more promo code discounts