I believe Shunshin is the teleportation jutsu, which is actually just extremely fast body speed. I can think of two instances, one where Sasuke blitzes Tobi and when Shino observes Tobi's jutsu.
The problem is that the differences between FTG, the body flicker technique (not sure if different from Shunshin), the Shunshin, and the teleportation jutsu were never clearly defined. They seemed to be used carelessly in the manga (like Rin referring to Minato's FTG as Shunshin). I know the differences between s/t jutsu and "teleportation" but not which applies to what technique.
I think it's open to interpretation unless Kishi addresses it in p3. Personally I highly doubt it's FTG, I think Kishi would have said explicitly so if it was, plus Naruto's BM speed is ridiculously fast so learning FTG wouldn't be super beneficial.
EDIT: NVM my ramblings, the other members have cleared it up for OP as well as me XD