Xcuse my interruption, but isp's advertise their speeds in bps (bits per second), & as gbildson pointed out, so does Bearshare. So divide your isp speeds by 8 minus overheads (between 13-20%) will give you your practical speeds in bytes/second. Also as gbildson pointed out, speeds depend upon your sources. Sources speeds can depend on how fast their upld connections are, how many slots they're sharing, etc. Some gnutella clients such as Shareaza (RAZA) are reknown for slow speed offerings due to their priorities & requirements for sharing on other networks. See the following link & follow all the off-shoot links to find hints & extra skills to help with your problem:
To continue files downlding (click on link) Remember, browsing hosts can help continue downlds & can also assist in finding more at times. Of course manual researches of the topic will also do very well to assist in this area. (More on overhead loss
HERE (click on link))