Alt-Tab popup delay should be removed
The problem
The application switcher popup delay gives the (wrong) perception that GNOME Shell is slow. There are at least 2 shell extensions that exist specifically to remove that delay. People not in the know will simply assume that something is wrong with GNOME Shell.
Someone even wrote a guide explaining how to remove that delay by installing one of the extensions...
The expected behavior
There should be no delay between pressing the shortcut key and the appearance of the application switcher. Ideally this should be the out-of-the-box experience, so that new users, and existing users who are not aware of the extensions, would get fast switching by default. Extensions can be allowed to set a delay, in case anyone fancies one.
Edited by Yariv