Yeah, was quite surprised when I received my Gabba as it's very definitely a jersey. Turned out to be too small so I've sized up and gone for the short sleeve + armwarmers option over the Long sleeve. Seems far more versatile as it definitely isn't a jacket.
The gabba isn't really like a pro team jacket. The latter is a jacket, the former is a jersey.
PTJ still my favourite ever piece of cycling clothing.