Client software these days is alpha or beta. It's not really ready for general consumption. That means not a lot of attention has been paid to usability. Developers are working hard to address the usability problem. They help you work around the problems new Gnutella users typically have.
More web sites implies more education.
We do this on our spare time. At the time I did the interview, that was true. GnutellaNet was having problems. GnutellaNet is now pretty stable and more usable than ever due to the efforts of dozens of Gnutella client developers. Every other industry I can think of has ungraded.