It depends on the hosts upload speed. You cannot d/l any faster than the host(s) can u/l.

I'm not sure what the max. d/l speed is, but I got up 140KB/s last night on one d/l.

You can go to in LimeWire 1) tools 2) options 3) Downloads - increase the max. number of downloads to say 50. You can give that a try, and see if it helps. It may allow you to connect more hosts when d/ling.