Nine Inch Nails is one guy on a computer and keyboard and drum machine, even though he makes a good attempt at dispelling this image by bringing out people with guitars at his "live shows", and also giving them credit on liner notes of his albums. Computer generated music 100%.
Clearly a very creative person. However, being a musician, I'm not fond of people who lay their claim to fame by:
Launching into the main stream via a cover song
Use drum machines and computers to mimic real instruments
etc. etc.
Yes, part of it is probably jealousy.
-mike