Torrents networks are special.
First of all, if theres 400 seeders and 4000 leechers, then of
course slow.
NAT problem is killer, if you have a router and did not do port
forward with static ip for your pc, then 10kbps is considered
fast
Also, it is important that you seed. You download speed is in ratio
to your upload speed in most torrent networks. This can prevent
selfish ppl who only download and don't share.
Btw, my speed for Azureus is 100kbps - 800kbps/s. You need to do a
lot of configurations, not just open it and use!
Finally look at how many seeds you are connected to, and NEVER
NEVER do force start options.
