Jay Honeck wrote:

*Does* everyone read it back?

I never have. All of my instructors over the years have told me not to. The
argument is that the controller will see the blip and tell you if you're
squawking the correct code or not. If they don't see the code in a minute or
two, they'll ask you to ident.

I've also never had a controller ask for a readback or sound upset that he
didn't get one. I *have* dialed in the wrong code once, and the controller
corrected me.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.