Previously anybody could set their LW or FW to be a T3 connection even when they were not using a true T3 connection which is a super fast connection. So too many people were stealing Ultrapeer connections which are needed to help people to connect with (eg: you having 10 or 14 hosts meant those only needing 3, 4 or 5 hosts to connect to the Gnutella network with would not be available.)

As it is now, I am not sure if obtaining that many hosts to connect with is still possible at all, but if it is, is probably reserved for those who do have true T3 connections with lots of bandwidth to spare 'including' for uploading (perhaps detected by the program) & are running in ultrapeer mode.