[citation needed]. My wife is from Apulia, and we visit the region multiple times a year. Never heard of this, always called a 'pizza' by its name there.
My wife is from the southern Salento where, as the wikipage itself shows, a different term is used. As it is common in Italy often dialects radically change withing a dozen kilometers.
Anyway, I do have good friends from Taranto, and this never came up; then again, there are so many synonyms of 'penis' in Italian and its dialects that if we were to avoid all of them we would have to rip out half of the dictionary.
True that :) Yes, dialects change even from my hometown to the next, which is at about 30 km. They have a similar but different word for "Thursday", for instance. Not to mention the change in accents within the same province.
This kind of richness is going to get lost as fewer and fewer people are taught the dialect of their own region (I reckon many parents think it is "uncool" or something), but I'm getting off topic :)