I work in a bakery, at Sainsburys, freshly made (dough mixed on site and baked as soon as it's proved) bread and rolls are all we do, the organic bread comes in packs of 4 needing to be finished off in the oven, the cookies are frozen as are all the Danish pastries, which need about 10 mins in the oven after defrosting. All the speciality French bread is frozen and the mini and ring doughnuts just need defrosting (jam and custard filled are freshly made). The baguettes and batons are sometimes fresh and sometimes frozen depending on how busy we are and as such if we've got time to mix it up etc etc
To be honest if you saw the state of the equipment in our bakery you'd be glad alot of it wasn't made there. As for piping the smell around the store, I don't know about other stores but we certainly don't. You can see the yellowing of the ceiling around the ovens where thsteam and heat wafts up and across the store roof lol