When looking for any file to download it is important to look for the number of seeders and leechers.
When a file is first put on a torrent it has one seeder, the person who put it there.
People then start downloading it to their PC from this one seeder and they are leechers.
Even while you are a leecher, and you only have part of the file, you then start seeding it to other people.
Once a person has 100% of the file they change from leechers to seeders.
So the more seeders at 100% the better as you have more chance of finding people who are logged on AND with a fast broadband connection.
If there are lots of leechers then that is also good, because you can download the file from them as well (the parts they have anyway).
Avoid files where there are no seeders at 100% but lots of leechers who have not got all the file. This indictaes that either it is VERY slow getting it from the original seeder, or that the original seeder turn their PC off now and again so you can only get it when their PC is on.
I use Azareus as my client not uTorrent.
http://azureus.sourceforge.net/
With Azareus you can easily find out how many seeders and leechers there are, also how many people are at 100%, also the speed of each of the connections.