Even if u d/l a song with a bitrate higher than 192 it might sound like crap. The bitrate is not the only important thing, in fact the program used for encoding from wav to mp3 is the most important thing for a good quality mp3. You can find a 256 kbps mp3 encoded with Xing that sounds worst than a 128 kbps in variable bitrate encoded with Lame. So the bitrate is not the main point for a good mp3.
In other words, if you want to d/l good mp3's you need tons of luck
I'm not english, i'm not even human, so stop laughing about my grammar