It was very funny when I went to have my ip4 replaced, a manager came out to help me (I had not made a G Bar appointment), he started to restore my phone and he whips out his ip4 and answers a txt. He swipes and reveals SB settings! I asked him "Jailbroken huh?" and he was like "I don't know what you are talking about." then he smiled and went back to his phone. I just laughed.
Its funny how apple always makes it seem like jailbreaking is so bad, yet an Apple Manager jailbreaks his phone. Lol.
I am sure many Apple employees are jailbroken too.
Plenty of ATT employees are also. Actually some point last year over heard one telling a customer to check out this site for some info on a questions they were asking.