I'm switching from iTerm 2 to the stock OS X 10.8.5 terminal (work policy, iTerm isn't on the approved software list). In my tmux configuration, I've mapped shift-left and shift-right to change windows. This worked in iTerm 2, but not in Terminal.app.
In vim (where I've mapped the naked left and right arrows to do something similar, with vim tabs), it acts as if I am pressing the arrow keys, unmodified.