Upper and lowercase leading

Again, taken from the book 'Finer points in the spacing & arrangement of type' by Geoffrey Dowding he states the issues with leading when it comes to upper and lowercase.

"If displayed lines in upper- & lower-case are mechanically leaded, then, in the majority of cases they will not appear to be properly spaced. Care is necessary in adjusting the leading of the lines so as to give visually even spacing between them. As the number of lines in a title, for example, increases, so does the problem of leading; and this problem of visual spacing is further increased when words in, or lines of, capitols, are introduced into the setting."

Example scanned from book of leading adjustments for upper and lowercase letters.