Comment 3 for bug 1283493

It's referred to as an "EFI System Partition" (or sometimes a "UEFI System Partition") in the EFI spec, so IMHO that's the name that should be used when referring to it in any "official" way within Ubuntu. Although there are, AFAIK, no other EFI partitions, IMHO it's important to use the name as it appears in the EFI documentation; significant deviation or shortening will raise doubts in users' minds about whether two documents or programs refer to the same partition. Furthermore, although the EFI spec doesn't compress "EFI System Partition" into an acronym, that's common practice -- many people and documents refer to the "ESP." The term "EFI partition," of course, does not lead logically to "ESP" as an acronym.

I've filed bug #739824 with Debian on this issue (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=739824).