Yes, <Ctrl><Alt>T does launch the Terminal. In fact, I just posted yesterday asking how to get rid of that shortcut. http://forum.linuxmint.com/viewtopic.php?f=205&t=126942
It was odd, though. You can check the shortcuts in "Cinnamon Settings - Keyboard, Keyboard shortcuts" and there is a "Custom Shortcut" to launch the terminal. However, in my experience, that shortcut didn't do anything. I changed it, tried to delete it, but <Ctrl><Alt>T continued to launch the Terminal. In the end, it was a gnome3 setting editable via dconf-editor that controlled it.