- Broken Base: Many of Delerium's fans weren't too fond of Poem or Chimera, although for some Nuages du Monde wasn't particuarly fantastic as well. For other long-time Delerium fans, they were less then happy when Delerium went from being dark, moody, ambient music; and began becoming very mature electronic pop-oriented. Of course, most of their fans didn't care and kept on listening.
- The same can be said about Conjure One, which is a side project of one of the members of Delerium. The album "Extraordinary Ways" was well-received by critics and sold exceptionally well, many of the fans weren't too blown away, expecting for Rhys to rehash the debut album.
- That One Song: Delerium has many fantastic tracks in their library of music, but most people became aware of them when they collaborated with Sarah Mc Lachlan and created the single "Silence" which has bought a lot of attention to Delerium and been remixed an obscene amount of times.
- The Other Darrin: Many people confuse Delerium with Enigma, Deep Forest and Future Sound of London.
- Delerium was founded in 1987.
- Enigma was founded in 1991.
- Deep Forest was founded in 1992.
- Future Sound of London was founded in 1988.
- There's a lot of similarities between all four of them, but Delerium is recognized as the pioneer of the sound that the other bands make use of.
- Interestingly enough, many people do not realize that bands like like "Synaesthesia", "Equinox" and "Intermix" are other additional side projects of Bill Leeb and Rhys Fulber, just like Delerium and Conjure One.
- Back in the days when Kazaa, Limewire and Napster were still super-dominant, people made the mistake of treating them as they were all the same and interchangeable.