In general this is true. HM and Buzz are kind of hit or miss with lines in the summer, but toward evening the others are usually decently short (10 minutes or less). Pirates is kind of a pain in the evening once they block things off for Fantasmic, it's crowded over in that area and difficult to traverse from one point to another.
During Fantasmic Splash Mountain often has no line at all, we have enjoyed a snack from Pooh's Corner and let the older kids ride over and over and over again.