It's not only "not completely true", it's completely wrong. Time machine local backups are listed as "backups" and therefore are not part of "other." At least that's what the time machine website says.This question is asked on a daily basis in the Hardware subforums. The usual explanation is that it's the time machine local backups.
This isn't completely true. You'll have "Other" even if time machine is completely disabled.
I know about the backups bit, but I am not 100% sure if all of the space eaten by the local backups is indeed in the backups category due to the contradictory posts on the subject that I've seen on the forum. I suppose I could enable TM and the local backups and start doing some testing when I have some free time.
We all have our ways of doing things
$ sudo du -h -d2 .MobileBackups/ 1.4G .MobileBackups//Computer/2011-12-27-182037 131M .MobileBackups//Computer/2011-12-28-221756 11M .MobileBackups//Computer/2011-12-30-012429 126M .MobileBackups//Computer/2011-12-31-025031 70M .MobileBackups//Computer/2012-01-01-033350 16M .MobileBackups//Computer/2012-01-02-035345 3.7M .MobileBackups//Computer/2012-01-02-165454 3.8M .MobileBackups//Computer/2012-01-02-175554 2.8M .MobileBackups//Computer/2012-01-02-185653 3.0M .MobileBackups//Computer/2012-01-02-195736 3.4M .MobileBackups//Computer/2012-01-02-220003 2.0M .MobileBackups//Computer/2012-01-02-220636 4.4M .MobileBackups//Computer/2012-01-02-221735 4.3M .MobileBackups//Computer/2012-01-02-230636 3.3M .MobileBackups//Computer/2012-01-02-235341 3.1M .MobileBackups//Computer/2012-01-03-000804 11M .MobileBackups//Computer/2012-01-03-001638 3.3M .MobileBackups//Computer/2012-01-03-005827 3.2M .MobileBackups//Computer/2012-01-03-011509 5.8M .MobileBackups//Computer/2012-01-03-012455 3.9M .MobileBackups//Computer/2012-01-03-021508 3.5M .MobileBackups//Computer/2012-01-03-031508 12M .MobileBackups//Computer/2012-01-03-100308 4.1M .MobileBackups//Computer/2012-01-03-102649 5.1M .MobileBackups//Computer/2012-01-03-113818 3.4M .MobileBackups//Computer/2012-01-03-122559 2.1M .MobileBackups//Computer/2012-01-03-132558 10M .MobileBackups//Computer/2012-01-03-142558 3.9M .MobileBackups//Computer/2012-01-03-152558 2.4M .MobileBackups//Computer/2012-01-03-162658 1.9G .MobileBackups//Computer 1.9G .MobileBackups/