Those things are repeated over and over:

If you dl from more hosts simultaneously, you'll get more speed.
Bigger files = usually less dl speed.
If you download from Shareaza users (RAZA vendor code) good luck to finish the download.
In options -> speed: you can select your connection speed, this will change the speed of downloads because:
Modem: you can only dl from 2 hosts simlmutaneously
Cable DSL: you can download from 6 hosts silmutaneously
T1/T3 and higher settings: you can download from 8 hosts simultaneously

Normally with firewall to firewall transfers in LW 4.2 and later, you should not really be penalized if you are firewalled in download speeds.

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