Yeah probably is, I've heard of a guy that has a Skoda Octavia (wagon) TSI and that has beat a few Golf GTI's which run the same engine, well the whole running gear actually; just the body is different
The 1.4 twin charged engine isn't in the polo's though, they run a 1.8T, only the Golf GT's came with 1.4TC and they are pretty fast
So for it to be faster than a Polo to is pretty good