TOAD for Windows v 12.11.0.95
If I select a fairly decent sized block of code (maybe a page or so) in the TOAD editor, for example, in the middle of a fairly large package and press TAB to increase the indentation or DELETE to lessen it, it takes an absolute age to do so. The same things happens if I ALT + Mouse drag a caret section and say use SPACE or DELETE.
When developing we're doing this all the time as part of code formatting, so it's a great hindrance and a weakness that could do with being addressed.