Mmm. Maybe. I think Microsoft's intention, and it has been somewhat successful, is to inculcate the Ctrl+Alt+Delete muscle memory into the wider user population beyond the group where it's actually in any way relevant to security (on a home machine where the main user and operator is also the only administrator, tricking the user with such a dialog is almost besides the points)
So you may find that in practice the story goes
User 1: "Oh, a message..." (doesn't read properly) Ctrl+Alt+Delete
User 2: "Oh, a message..." (doesn't read properly) Ctrl+Alt+Delete
User 3: Ctrl+Alt+Delete "Wait did that say... whatever, it worked"
User 4: "Oh, a message..." (doesn't read properly) Ctrl+Alt+Delete
User 5: "Ctrl+Alt+Insert? What's this? Hey, you, IT guy, why does this say Ctrl+Alt+Insert, don't you get tired of changing things for no reason?"
Administrator: "Mmm, infected PC. Wipe it and re-install"
[ Malware is no longer installed ]
Someone would have to do an experiment to check, but this wouldn't be the first time it turned out users are (in a sense) too dumb to fall for a clever trick.