Vinnie has been "tweaking" the host cache to be sure that the networks remain connected. I dont remember the exact numbers but BS clients will clump together but maintain many connections to the rest of the network. All you need to do is look at the search results to see that results are coming from all over and thus the network is still connected. Blocking BS will only make the situation everyone here is complaining about worse.

For anyone that hates BS, try the latest beta (14 I believe). As soon as 2.5 goes public 3.0 code is ready for testing. This will introduce ultrapeers which will make the BS cluster very small, thus providing for even more connectivity to the rest of the network.

2.5 also introduces download meshes for finding more sources!! What a great feature.